Using 'valid_email' gem to validate emails
WIP new invitations
JoinRequest stuff renamed
Join request by user and approval working
Refactor join_requests routes
Remove old join_requests views
No more errors on space/users
Use different version of station without invitations
Space admin invitation view working
Admin inviting users using new system
Remove links to old invitations in space edit
More corrections to space invitations and haml view
Refactoring to use new invites on webconf and event
Tests for new events behavior
Correct tests for user model
Tests for users accessors and relations
Correct spaces index when there's no loged in user
Restore register + attend to event functionality
Correct invite emails and remove some old routes