Collection docs: models is not optional if options is passed in
Enhancing Model with isEmpty function
Adding the isEmpty function into the modelMethods
Merge pull request #3265 from tomascasas/bb-col-doc-update

Collection docs: models is not optional if options is passed in
Send correct 'at' when firing 'add' event
Merge pull request #3039 from fastest963/master

Send correct 'at' when firing 'add' event
Merge pull request #3301 from AndrewEastwood/patch-1

Enhancing Model with isEmpty function
draft changelog for backbone 1.2.0