New: Possibility to simulate a event CPMouseMoved over a point

Previously it wasn't possible to simulate the event CPMouseMoved.
Now we can, and then simulate a mouseEntered and mouseExited in a Cappuccino application.

This PR fixs also some small issues about exception generated by ruby when simulating event on point and not views.
Merge pull request #6 from Dogild/CPMouseMoved

New: Possibility to simulate a event CPMouseMoved over a point