fix success callback arguments on backbone 1.0.0
Run tests with multiple versions of Backbone

Since we are introducing some code which sniffs the backbone version we
need to run the tests against different versions of backbone.

This also introduces tests which are specific for one version.
Merge branch 'backbone-v1.0.0' of https://github.com/jtuulos/backbone.paginator into jtuulos-backbone-v1.0.0