Began refactoring classes

Hopefully, this will make the package more testable and allow for
greater flexibility with filters
Update unit tests for refactored code
Updated .travis.yml for composer

Updated .travis.yml to load composer before running unit tests
Type-o...
Modified Assets::render() function
Refactored package to utilize Assetic
Added Assetic dependency
Resolved issue with getCompiledName() function
Adjusted compile() due to travis-ci error
Added initial support for Less files
Removed unused function from Assets.php
Tried to resolve dependency issues
Still working on dependency issues
Added dependency for coffeescript
Added back in dependency for lessphp
Added support for coffeescript (included unit test)
Created unit tests for less and coffeescript
Added missing @ to unlink() in AssetsTest
Merge pull request #5 from bradstinson/develop

Moving refactored code back in master branch