Adds migration to Email Settings for Venue Updates
 [Bugfix] Confirmed / Unconfirmed events over time for conference dashboard
Only show openid options if providers are set in User model.
fix: use ruby's way for interpolation
Merge pull request #297 from ChrisBr/bugfix_events_over_time_new

 [Bugfix] Confirmed / Unconfirmed events over time for conference dashboard
Added nil checks for call for papers in event index
Changed first / lastname to name

close #342
close #344
Merge pull request #345 from ChrisBr/bugfix_events_index

Added nil checks for call for papers in event index
Venue update notifications done
Added tests for emails views specs for addition of settings
Merge pull request #318 from gopesht/notify_on_venue_change

Email notification to all participants on venue update
Merge pull request #311 from differentreality/openid

Only show openid options if providers are set in User model.
Set js_errors to false in poltergeist driver
Merge pull request #357 from gopesht/fix_flickering_test

Set js_errors to false in poltergeist driver
Delayed job integration done