add click event to interaction api
add notify_inviter to model & api
Merge branch 'THINK-279-TRN' into THINK-242
Merge branch 'THINK-277-TRN' into THINK-242
api permitted params tests
http://pivotallabs.com/testing-strong-parameters-redux/
Merge branch 'THINK-296-TRN' into THINK-242
change invitee.invite_token to invitee.url
Merge branch 'THINK-297-TRN' into THINK-242
change visitor.share_token to visitor.url
Merge branch 'THINK-297-TRN' into THINK-242
Merge branch 'THINK-242' into THINK-275-TRN

Conflicts:
	app/controllers/api/v1/invitees_controller.rb
	app/controllers/api/v1/visitors_controller.rb
	app/decorators/visitor/invitation_decorator.rb
	db/schema.rb