Cleanup

Fix: No longer requires consumers of this package to use the DesktopG…

…L version of MonoGame.

Refactor: incrementing package version.

Refactor: using Macabresoft.Core.

Feature: Updated to MonoGame 3.8.

Updating author.

Fix: Initialized SpriteAnimationComponents will set their sprite to t…

…he first frame of the default animation (if it exists).

Fix: Initialized SpriteAnimationComponents will set their sprite to t…

…he first frame of the default animation (if it exists).

Fix: SongPlayer working properly for the first time after the last bi…

…g refactor.

Refactor: removing all engine stuff from repo.