Refactorings, updates

Hi,

I have done some refactorings. 
- Updated the yuicompressor to the latest version and symlinked it
- Added a license section. Please answer that question what license it is.
- composer.json with modman file
- Removed unnecessary checkings of the yuicompressor jar file
- Removed the bin directory and moved that to the lib dir.

It would be cool, if you can merge that.

Cheers, Cyrill