Only show join button if needed
Add invisible named_scope

Conflicts:
	app/models/profile.rb
Implement task_created_message
Put linked_subject
Fix render partials and add plugins' views_paths
Convert task messages to HTML
Fix associate enterprise creation notification
Remove duplicate open scope
Merge branch 'distribution-plugin' into cirandas

Conflicts:
	app/models/profile.rb
	app/models/task_mailer.rb
	app/views/task_mailer/target_notification.rhtml