adds a Facebook like button for ads and the iupb_dev app_id (this is safe and uncritical to publish, and its enough for the like button)
Merge branch 'develop' of https://github.com/dirkschumacher/iUPB into develop

# By Dirk Schumacher
# Via Dirk Schumacher
* 'develop' of https://github.com/dirkschumacher/iUPB:
  minor change in language file :)
  adds some helper bullet points for the new form

Conflicts:
	config/locales/de.yml