v0.5.0-beta

There were many additions to this release. The biggest addition is Object Packs! Now object images can be changed by their properties on a case by case basis. An example is, the Y-Switch can now show which direction it's in in the image. The music notes can also be colored by the color property. There were many more fixes and improvements, but right now, I can't be bothered to figure them out (I had a week break before this release, so I forgot what I had done).