Added PubSubjs to the list

Quick and simple definition for PubSubjs
Updated PubSubJS commit to follow guidelines

Added test file for the PubSub interface.
Added version number to the Definition.
Merge pull request #567 from Piranacon/master

Added PubSubjs
Added definitions for jasmine-matchers
Added definitions for chai's assert-style assertions
Merge pull request #568 from Bartvds/master

Added definitions for jasmine-matchers and chai's assert