DG MS; added link to send invitation, consolidated locale file for devise invitable, upgraded devise to 1.1.3 in the gemfile

Unfortunately, we can't put ruby-debug in the gemfile because it breaks 1.9.2 compatibility.  Just put it back in locally when you want to use it, or figure out how to do a switch by ruby verison in the Gemfile

MS DG made async webfingering controller.  need to call it from javascript to prevent seeds from blocking.  remember to update your gems

move to it later