Some minor changes
But still buggy :/

- Updated locales
- Fix checkboxes
Merge branch 'develop' of github.com:guluc3m/gul-gultalks into develop

Conflicts:
	config/locales/en.yml
	config/locales/es.yml
Simplified conference and event controllers. Moved url_shortener to events controller
Merge remote-tracking branch 'upstream/develop' into develop
Added missing locale