add user_id to invitations database via migration
add model associations
add UserMailer to invitations controller
add model validations to spec
factories refactor
controller specs refactor
Merge pull request #21 from purple-martins-2013/factories

Factories and controller specs refactor
Merge branch 'master' into mailer-invitations
minor updates
Merge branch 'master' of https://github.com/purple-martins-2013/live-together into grocery-items-update
uniqueness added for grocery_item with 1 test and flash notice
index migration
grocery list flash notice and proper redirect. add 1 test. remover errors loop from list form since flash notice used
remove house column from invitations
update tests to respond to the new invitation model
add inviting user's email to the invitiation email
Merge pull request #22 from purple-martins-2013/mailer-invitations

Mailer invitations
add test not to increase count when duplicate item or list added
Merge branch 'master' of https://github.com/purple-martins-2013/live-together into add-uniqueness

Conflicts:
	db/schema.rb
change flash notice to flash alert, remove extra enters