v0.6.0

This release fixes a bug where if a character animation is looping, and a new character is loaded, the new character would either start looping as well or throw an error. Pointed out by @vaab

This release adds more robust error handling for loading character data, and adds onLoadCharDataSuccess and onLoadCharDataError callbacks that will be called in the event of char data loading successfully or error. More discussion at #42. Thanks again to @vaab!