Loader no longer attempts to load audio files it thinks it won't be able to decode. Preventing game 'breaking' on devices.
WebGL - ClampToEdge implemented in TextureWrapper. Resizing images to be base2 removed (as no longer needed).
Removed a toDataURL() left on the TextField GameObject.
Keyboard Manager / Keys updated.

- JustPressed/Released now functioning.
- Key's using game time now.
- Key Repeats now resets with each press.
- OnKeyDownOnce Signal added.
Can now prevent the default action of individual keys when they are pressed/released.

- PreventDefault property added to keys.
- New parameter added to 'addKey' method
Audio workaround for CocoonJS added. Console.log added before retrieving duration of the audio tag makes the duration work.
Fixed bug where the onCompleteCallback would only the first time when a Tween was started, and would not start any subseqent time.
Workaround for Sound in CocoonJS added/updated. Also the 'no-sound'/sound not found console.log for browsers have been only appears when debuging now.
Audio. Added new parameter 'onlyIfSupported' to the 'addAudio' method, to allow users to always load in a audio piece regardless of support.
Re-implemented the check/conversion of textures to base2.
Force set vertexAttribPointers every draw - temporary attempted work around for cocoon rendering issue
v0.6.1
Merge branch 'dev'