ACs now have program start date, and reviews are still automatically created
Merge pull request #63 from valerie-roske/ac-program-start-date

#379 & #315: ACs now have program start date, and reviews are still automatically created
solve more n+1 problems
Merge pull request #64 from valerie-roske/query-optimization

#tech: solve more n+1 problems
invitations don't have users :)
Merge pull request #65 from valerie-roske/fix-qa

#tech: invitations don't have users :)
#218 - Change backend to allow users to request feedback from multiple users
#218 - Fix 'request feedback' form UI to describe multiple email input
added test to check for existing invitations
fixed issues with flash in invitations_contoller showing up improperly
Use invitation validation error messages in controller
refactored validations for invitations and removed @example.com emails