Small changes in invitation code
-Autoredirect invited user to application root-Print debug message with invitation URL-Fix error in Invitations.__unicode__
Invitations improvements, Refs. #439
- show remaining invitations- i18n enabled strings
invitations template modifications, Refs. #431
work with ajax calls
Welcome and error pages for invited users
Invitation email template
refs: #439
Support for identifying and printing invitation form errors
Refs: #439
Invitations are saved and displayed
Dynamic field addition/removal works
Dynamic list of names-email for sending invitations
Custom template invocation as per verigak's blueprints
Rough email invitation UI, fix invocation parameters for it