[WIP] Moving to AdminLTE

Moving default interface to AdminLTE

 * [x] Layout
 * [x] Menu
 * [x] Assets
 * [ ] Templates
 * [ ] Forms
 * [ ] Javascripts
 * [ ] Filters ?
 * [ ] Nested List ?
 * [ ] Login page ?

_PR opened now but not ready to merge. Just to let discussion if any. All feedbacks are welcome._
For now, filters are back on the side.

I'll push them on top of the table in a second step with collapse box functionnalities... probably...