Minor FIxes

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Port to N-API and Libsodium 1.0.16

Refactor node-sodium to use N-API instead of NaN, in order to support multiple versions of node without having to tweak the code.
Should give us some future proofing of the module.

Updated Lib Sodium to version 1.0.16

Patch to fix install issues

No code changes, but added too much stuff to .gitignore and broke install...

1.2.0

Update to libsodium 1.0.11

1.1.10

Windows 64 Bit support for npm install

1.1.7

Added support for Windows installs without having to resort to a manual build.
Fixed Zero length message buffer errors (#77)
Other minor improvements.

1.1.5

Fixes npm install issues.

1.1.0

This is a major release due to the total refactoring of the original code. Each function type is now in their own source files, as sodium.cc was getting way to big to be easily maintained.

Ported libsodium to 1.0.10
Implemented most functions in libsodium 1.0.10

Testing the new implementations is still a work in progress.

High level API was not changed and support for the new functions will come in a future release

1.0.21

Fixed #49 Nan issues and some other minor things

v1.0.17

Added support for Node 0.11 and 0.12
Updated to libsodium 1.0.3
Improved multiplatform support and install