Fix NRE in TextureAtlas.FromSpritesheet
Optimize TextureAtlas class and fix random green pixels in TextureAtlas.GetTextureFromFrame
Use TextureAtlas for Autotile Guides
TextureAtlas.GetPreviewTexture no longer has 1px padding or texture bleed
Refactor over-complicated tile caching process and do everything from TileAtlas
Condense individual guide images into single images. Saves on a ton of space.