add facebook auth
Typo fixed.
social networks controller refactoring
Merge branch 'feature/facebook_auth_#19' into develop
Merge branch 'develop' into feature/add_events_crud_and_create_event_page

Conflicts:
	Gemfile.lock
	app/controllers/web/application_controller.rb
	app/views/layouts/web/shared/_navigation.html.haml
	config/locales/flash.yml