Fix a bug when not using root url for the application. 
Force to always use yoursite.com/static instead of
yoursite.com/yourpath/static
http://stackoverflow.com/questions/8879231/relative-paths-using-extjs-4
Incremented version number.
Merge pull request #26 from tremblaysimon/fixextjsrelativepath

Fix a bug when not using root url for the application.