Fixed some errors in articles#sync. Show better error messages.
Fixed loosing assignments when updating a task.
Fixed wrong articles total in group_order#show.
Update group results when editing order article in balancing.
Fixed modal forms. Submit form when hitting enter.
Allow article price equal to zero. Closes #111
Added quiet_assets gem to have cleaner log file in developing.
Fixed setting all user setting to false in user profile.
small i18n/translation fixes
finish deliveries i18n
helpers i18n
use more beautiful close mark
finish tasks i18n
finish pages i18n
fix tasks error reference
add documents en translation
update en translation
Merge remote-tracking branch 'bennibu/rails3' into rails3

Conflicts:
	app/controllers/articles_controller.rb
	app/views/articles/_form.html.haml
	app/views/articles/sync.html.haml
	app/views/finance/balancing/_edit_note.html.haml
	app/views/finance/group_order_articles/_form.html.haml
	app/views/finance/order_articles/_edit.html.haml
	app/views/finance/order_articles/_new.html.haml
	app/views/group_orders/show.html.haml
	app/views/invites/_modal_form.html.haml
Merge branch 'rails3' into rails3-multiimport