Per bower/bower.json-spec@a325da3 Also their maintainer says they probably won't ever use it: http://stackoverflow.com/questions/24844901/bowers-bower-json-file-version-property
There was a bug with setting the eventify variable on `renderer.js`. Instead of ngraph.events, the variable is set from the `ngraph.graph` After this fix, publicEvents object has on and off methods to register events. event registration methods for the renderer erroneously uses `publicEvents.addEventListener` and `publicEvents.removeEventListener` method. changed the method name to `on` and `off`, respectively.