Add recommended config and update docs

README.md

@@ -20,7 +20,24 @@ $ npm install eslint-plugin-flow-header --save-dev
 
 ## Usage
 
-Add `flow-header` to the plugins section of your `.eslintrc` configuration file. You can omit the `eslint-plugin-` prefix:
+### Recommended configuration
+
+Add `flow-header` to your `.eslintrc` configuration file by extending the `recommended` configuration. The recommended config just adds the `flow-header` rule to your configuration.
+
+```json
+{
+  "extends": [
+    "plugin:flow-header/recommended"
+  ],
+  "plugins": [
+  	"flow-header"
+  ]
+}
+```
+
+### Add Eslint Rule
+
+You can also add the rule manually by using flow-header as a plugin. Add `flow-header` to the plugins section of your `.eslintrc` configuration file. You can omit the `eslint-plugin-` prefix:
 
 ```json
 {

lib/index.js

@@ -16,7 +16,14 @@ var requireIndex = require("requireindex");
 
 
 // import all rules in lib/rules
-module.exports.rules = requireIndex(__dirname + "/rules");
-
-
-
+module.exports = {
+    configs: {
+        recommended: {
+          plugins: ["flow-header"],
+          rules: {
+              "flow-header/flow-header": 2
+          }
+        }
+    },
+    rules: requireIndex(__dirname + "/rules")
+}