Purecss.io integration.
Log of fixes in layout.
CSS Fixes.

All the CSS that was writen directly inside tags has been placed in woko.css.
Added twitter bootstrap alert mecanism.
Glyphicons, dropdownmenu, fix on object view.

- Glyphicons classes from bootstrap have been added to woko.css
- Dropdownmenu have been re-coded from scratch
- "View" object was not very great, now it's nice