Update createjs libraries to most recent version

Definitions update for easeljs v0.8, tweenjs v0.6, preloadjs v0.6 and soundjs v0.6.

There were many changes in this release, so I may have missed somethings. If someone else could give a look at this update as well, it would be nice.

Cheers!
I think `getResult(...param: any[]): Object;` is better.  please see LoadQueue.getResult() and XHRRequest.getResult(). 

http://www.createjs.com/Docs/PreloadJS/classes/LoadQueue.html
http://www.createjs.com/Docs/PreloadJS/classes/XHRRequest.html