added docstrings
Fixed docstring
Moved button template to different location
changed name bootstrap -> bs3demo to avoid confusion
simpler path finder
Fixed name of included modules
Unit testing BS grid system
Directory structure has changed
added dummy template to test environment
Rewrote test as required by DjangoCMS docs: testing plugins
Test the BS grid system
Added documentation for BS3 grid system
Partially rewrote documentation for cascade-0.4
merge improvements from upstream 0.4.0