Version 2.0.3 - Updating to support modifying haxelib.json, etc.

Resolves #11 

Here are the changes:
- mlib updated all the files to 2014
- removed Haxelib.xml code
- added support for [Haxelib.json](http://haxe.org/manual/haxelib-json.html)
- added support for multiple _contributors_
- added tests for JSON parsing
- added support for 3 digit version numbers
- updated dev install to use ```haxelib local [zipfile]```
- updated version to 2.0.3