Added Invitation model
Added Name uniqueness for Location & Piece
Fixed bug in determining Location availability
Add invitees to Rehearsals#new

Added #show & #edit routes & permissions
Updated Rehearsal #show and #new UI
Added model for AgmaProfile
Add Account#edit & update #new layout to work with edit
Created AgmaProfile#edit & Account#show pages

Added Class Break in Min to Agma Profile
Agma Profile created when Account is created
Updated hr12 format to NOT have leading space
Added translations for Model attributes to have nice error messages