complete some informations in readme file
begin working with http cache header
create constant for folder management
start creating folder management
translate some missing string
comment dev menu in layout
Merge branch 'master' of github.com:thelia/thelia
re-add home link in menu
Merge branch 'master' of github.com:thelia/thelia
Merge branch 'master' into content

Conflicts:
	core/lib/Thelia/Core/Event/TheliaEvents.php
	templates/admin/default/folders.html
display info in folders edition template
create folder events
process folder update action
icreate folder delete event
add dispatcher before/after for folder crud management
allow to create folder
allow possibility to change folder visibility
implement process for changing folder position