UI for inviting people by email
Invitation wording and design change
Client side code started
Email regex moved to lib
Merge branch 'master' into email-invites
Server side for email invitations.
Client side for account enrollment.
Provide a way to get access to the email address of invited users.
Client side code finished
handle stop pattern optimized
Invite friends

Newsletter dialog refactored into popup dialog to allow reuse for the
invite dialog.
Pull request feedback
Refactored dialogs into own files

So far this consists of newsletter subscribe and invite friends dialogs.
Cleanup

Git thinks footer.coffee moved into dialogs.coffee, which is true that
the code went there, but the file wasn’t actually moved/deleted and now
he’s surprised there’s footer code still here.
Minor pull request feedback
Optional message when inviting users. Fixes #443
Pull request feedback
Dialog variables corrections
Invite user message null bug
Migration for invited field.