this adds submenu functionality to the menu
Merge branch 'develop' of github.com:divio/django-cms into develop

Conflicts:
	cms/templates/cms/toolbar/menu/item.html
added correct post data to ajax request
fixed up menus to look the same and enabled copy
adds html fixes (switch to html5)
refactor menu renedering (now the same)
added quicksearch functionality
dropareas are now hidden and shown when dragging, removed example html from submenus and rearranged entries
show and hides settings from draggables,
optimize delays
make menus act smoother
make setting buttons slightly bigger
reset all submenus
fixed
added close, hide and maximize functions to sidebar
removed example code
Merge branch 'develop' into FinalAngel-develop
fixed tests