Issue #73 Change relation between Idea/UserNotification and User from many to many to has many through
Merge branch 'master' into C1_AminaZoheir_#73_Notifications_migrations

Conflicts:
	Idearator/app/models/user.rb
Merge branch 'master' into C1_AminaZoheir_#73_Notifications_migrations
Merge pull request #123 from DevYah/C1_AminaZoheir_#73_Notifications_migrations

Issue #73 Change relation