[Closes #145] Add support for MouseMove event
Fix tests (missing mouseMove mock)
Included new specs in VS soln
Add new specs to bat
Add Windows 8 version of sample game
Added touch support
Update README.md
Make engine public off of scene, root scene needs reference to engine
Added logging if error is thrown in promise and no error handler is specified
Closes #175 Add removeEventListener to Engine and Actor
Merge branch 'remove-event'
Merge branch 'master' of github.com:eonarheim/Excalibur
[Fixes #181] Get canvas offset properly for events