Improved Spy and MovieClipSpy

MovieClipSpy had the method get box() which is only applicable to a
specific aplicaation. This method has been removed to improve the API

MovieClipSpy wasn't passing all the aruments of gotoAndStop to the Spy,
causing errors.

Removed some duplication in Spy.
Added assertLoggedAtPosition, needs refactoring
Added fix to allow MovieClipSpy.currentFrame
Added TestSuiteCollector