Amélioré les activités.

Merge remote-tracking branch 'origin/master'

Conflicts:
	app/controllers/group/members_controller.rb
	config/locales/fr/activity.yml
#
# It looks like you may be committing a merge.
# If this is not correct, please remove the file
#	.git/MERGE_HEAD
# and try again.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Your branch and 'origin/master' have diverged,
# and have 1 and 5 different commits each, respectively.
#
# Changes to be committed:
#
#	new file:   2
#	new file:   5
#	modified:   app/controllers/group/members_controller.rb
#	deleted:    app/views/c_files/_form.html.haml
#	deleted:    app/views/c_files/edit.html.erb
#	deleted:    app/views/c_files/index.html.haml
#	deleted:    app/views/c_files/new.html.haml
#	deleted:    app/views/c_files/show.html.erb
#	new file:   app/views/public_activity/group_work_group/_signed_up.html.haml
#
Ajouté un fil d'actualité sur l'index du site.