Greatly improve jekyll building time and other build ameliorations

- building project execute at least 3000% time faster by removing bower_component from doc
- add dependancies information inside gulpfile (to be changed?)
- remove old unecessary depancies from bower and packages
Remove old crappy less
Add demo for new grid system
Updating .gitignore
Add more demo on responsive page & various fixes
Fix responsive demo + composent demo
Start panel demo.
Updated demo for panels
Add basic demo to panel demo
[Fix] panel demo for stacked session
Updating fabfile.py
[fix] ev-fdm demo
Refacto demo + new demo for the new panels / layout classes
Adding KSS compiler to ev-fdm-demo
Adding kss doc to ev fdm
Updating bower.json
Design improvements branch created
Add a watch task for kss
[Fix] Add the kss.js to the documentation page

    - This allows to generate the doc automatically for the default states
      (hover, disabled, ..)
[kss] Button - Doc generated