DolphinOES alpha 0.4.4a

Refactoring:
    - UnifiedAssetManager instance in GameInformation renamed from assetLoader to assetManager
    - AssetLoader moved to Helpers.AssetLoading package.

Main:
    - UnifiedAssetManager.unload return a boolean based on whether the asset was found
    - UnifiedAssetManager.unload method that takes only the filepath parameter added.

Documentation:
    - Documentation added for UnifiedAssetManager.unload