adjust notification texts [Fix #61418846]
fixed user creation on facebook omniauth
Merge pull request #467 from diogob/fix_create_from_hash

fixed user creation on facebook omniauth
Merge pull request #466 from adrianob/notification_adjustments

adjust notification texts [Fix #61418846]
fix project admin filters [Fix #60408752]
Merge pull request #469 from adrianob/fix_admin_filters

fix project admin filters [Fix #60408752]
added notification for lost thumbnails of projects online
added lost profile image notification
added notification for offline projects that lost their thumbnail
Added constraint to make authorizations unique per user and oauth provider. We need this to make the user data consistent and avoid authentication failures that create duplicate authorizations and log the user in a wrong account.
fixed rake task to send backer confirmations
fixed rake task to send backer confirmations
fixed rake task to send backer confirmations