diff --git a/package-lock.json b/package-lock.json
index 2d3b30a..8c02353 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,6 +16,11 @@
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+              "optional": true
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@@ -4912,6 +5551,7 @@
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               "bundled": true,
               "dev": true,
+              "optional": true,
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               }
@@ -4920,6 +5560,7 @@
               "version": "2.10.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
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                 "hoek": "2.16.3"
               }
@@ -4928,6 +5569,7 @@
               "version": "1.1.7",
               "bundled": true,
               "dev": true,
+              "optional": true,
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@@ -4936,7 +5578,8 @@
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               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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@@ -4953,12 +5596,14 @@
             "code-point-at": {
               "version": "1.1.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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               "version": "1.0.5",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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@@ -4966,17 +5611,20 @@
             "concat-map": {
               "version": "0.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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             "console-control-strings": {
               "version": "1.1.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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             "core-util-is": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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@@ -5022,7 +5670,8 @@
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               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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@@ -5048,7 +5697,8 @@
             "extsprintf": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
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@@ -5070,12 +5720,14 @@
             "fs.realpath": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "fstream": {
               "version": "1.0.11",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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                 "inherits": "2.0.3",
@@ -5131,6 +5783,7 @@
               "version": "7.1.2",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "fs.realpath": "1.0.0",
                 "inflight": "1.0.6",
@@ -5143,7 +5796,8 @@
             "graceful-fs": {
               "version": "4.1.11",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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             "har-schema": {
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@@ -5182,7 +5836,8 @@
             "hoek": {
               "version": "2.16.3",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "http-signature": {
               "version": "1.1.1",
@@ -5199,6 +5854,7 @@
               "version": "1.0.6",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "once": "1.4.0",
                 "wrappy": "1.0.2"
@@ -5207,7 +5863,8 @@
             "inherits": {
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               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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@@ -5219,6 +5876,7 @@
               "version": "1.0.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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               }
@@ -5232,7 +5890,8 @@
             "isarray": {
               "version": "1.0.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
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@@ -5305,12 +5964,14 @@
             "mime-db": {
               "version": "1.27.0",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "mime-types": {
               "version": "2.1.15",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "mime-db": "1.27.0"
               }
@@ -5319,6 +5980,7 @@
               "version": "3.0.4",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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               }
@@ -5326,12 +5988,14 @@
             "minimist": {
               "version": "0.0.8",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "mkdirp": {
               "version": "0.5.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -5384,7 +6048,8 @@
             "number-is-nan": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "oauth-sign": {
               "version": "0.8.2",
@@ -5402,6 +6067,7 @@
               "version": "1.4.0",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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               }
@@ -5431,7 +6097,8 @@
             "path-is-absolute": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "performance-now": {
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@@ -5442,7 +6109,8 @@
             "process-nextick-args": {
               "version": "1.0.7",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "punycode": {
               "version": "1.4.1",
@@ -5480,6 +6148,7 @@
               "version": "2.2.9",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
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                 "core-util-is": "1.0.2",
@@ -5524,6 +6193,7 @@
               "version": "2.6.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "glob": "7.1.2"
               }
@@ -5531,7 +6201,8 @@
             "safe-buffer": {
               "version": "5.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "semver": {
               "version": "5.3.0",
@@ -5585,24 +6256,26 @@
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-            "string_decoder": {
-              "version": "1.0.1",
-              "bundled": true,
-              "dev": true,
-              "requires": {
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-              }
-            },
             "string-width": {
               "version": "1.0.2",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "code-point-at": "1.1.0",
                 "is-fullwidth-code-point": "1.0.0",
                 "strip-ansi": "3.0.1"
               }
             },
+            "string_decoder": {
+              "version": "1.0.1",
+              "bundled": true,
+              "dev": true,
+              "optional": true,
+              "requires": {
+                "safe-buffer": "5.0.1"
+              }
+            },
             "stringstream": {
               "version": "0.0.5",
               "bundled": true,
@@ -5613,6 +6286,7 @@
               "version": "3.0.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-regex": "2.1.1"
               }
@@ -5627,6 +6301,7 @@
               "version": "2.2.1",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "block-stream": "0.0.9",
                 "fstream": "1.0.11",
@@ -5682,7 +6357,8 @@
             "util-deprecate": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "uuid": {
               "version": "3.0.1",
@@ -5711,7 +6387,8 @@
             "wrappy": {
               "version": "1.0.2",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             }
           }
         },
@@ -6208,6 +6885,11 @@
         }
       }
     },
+    "sprintf-js": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
+      "integrity": "sha512-VE0SOVEHCk7Qc8ulkWw3ntAzXuqf7S2lvwQaDLRnUeIEaKNQJzV6BwmLKhOqT61aGhfUMrXeaBk+oDGCzvhcug=="
+    },
     "string-width": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -6233,21 +6915,66 @@
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
       "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc="
     },
+    "supports-preserve-symlinks-flag": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
+      "integrity": "sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w=="
+    },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "requires": {
+        "is-number": "^7.0.0"
+      }
+    },
     "trim": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/trim/-/trim-0.0.1.tgz",
       "integrity": "sha1-WFhUf2spB1fulczMZm+1AITEYN0="
     },
+    "unc-path-regex": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
+      "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo="
+    },
+    "underscore": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz",
+      "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk="
+    },
+    "underscore.string": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/underscore.string/-/underscore.string-3.3.6.tgz",
+      "integrity": "sha512-VoC83HWXmCrF6rgkyxS9GHv8W9Q5nhMKho+OadDJGzL2oDYbYEppBaCMH6pFlwLeqj2QS+hhkw2kpXkSdD1JxQ==",
+      "requires": {
+        "sprintf-js": "^1.1.1",
+        "util-deprecate": "^1.0.2"
+      }
+    },
     "unist-util-stringify-position": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/unist-util-stringify-position/-/unist-util-stringify-position-1.1.1.tgz",
       "integrity": "sha1-PMvcU2ee7W7PN3fdf14yKcG2qjw="
     },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
     "uuid": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.1.0.tgz",
       "integrity": "sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g=="
     },
+    "v8flags": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
+      "integrity": "sha512-mH8etigqMfiGWdeXpaaqGfs6BndypxusHHcv2qSHyZkGEznCd/qAXCWWRzeowtL54147cktFOC4P5y+kl8d8Jg==",
+      "requires": {
+        "homedir-polyfill": "^1.0.1"
+      }
+    },
     "vfile": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/vfile/-/vfile-2.0.0.tgz",
@@ -6406,6 +7133,19 @@
         }
       }
     },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
     "x-is-string": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/x-is-string/-/x-is-string-0.1.0.tgz",
diff --git a/package.json b/package.json
index c61501d..5c85b26 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "dependencies": {
     "bluebird": "^3.1.1",
     "ejs": "^2.5.7",
-    "grunt": "0.4.2",
+    "grunt": "1.5.2",
     "grunt-contrib-clean": "~0.5.0",
     "grunt-contrib-coffee": "~0.10.1",
     "grunt-contrib-concat": "~0.3.0",