GUI first mixins
GUI first mixins 2
Merged master into interface_dev
Merge branch 'master' into interface_dev
First UI test

-Added some mixins, deleted old ones for GUI
-Render a simple navigable menu
Updated Makefile to compile doc (with gui folder)
Updated comments
Removed useless mli (been replaced)
Container are now polymorphic
Container are now polymorphic
Drawing the menu only when it should
Merge branch 'interface_dev' of https://github.com/GL-MPRI-2014/GL_MPRI_2014 into interface_dev
Readme takes into account menu
Menu showing where the cursor is
Better menu (but still buggy)
Better menu handling + callbacks
Better menu handling + callbacks
Fixed menu behaviour
Fixed menu size
Updated README