Remove all the references to `twitter_avatar`
Merge branch 'twitter-avatar-promotion' into remove-twitter-avatar

:sob:

Conflicts:
	app/models/twitter_avatar_promotion.rb
	spec/models/twitter_avatar_promotion_spec.rb
Merge branch 'master' into remove-twitter-avatar
Merge branch 'master' into remove-twitter-avatar
Merge pull request #81 from ricardovaleriano/remove-twitter-avatar

Remove twitter avatar