implement route and controller action for creating an invitation, as well as create the form for creating an invitation on the house#show page
Merge branch 'master' into user-invitations
user can accept invitations from the new house page, and then will be assigned to that house
fix stupid bug in the view for showing invitations
Merge branch 'master' into user-invitations
add controller tests for invitations_controller
add feature test for user inviting another user
fix typo in feature test describe
add feature test for user accepting an invitation to a house
tweak house controller spec
Merge pull request #12 from purple-martins-2013/user-invitations

User invitations