STSM Updated - Complete Rebranding

Sonic Tile Sheet Maker has now become Sidescroller Tile Sheet Maker!

I have expanded STSM using new tile generation algorithms I developed. Along with the already known shapes (now implemented in software, bye-bye slopeBase.png), new circle slopes as well as distorted sine slopes in multiple sizes. That should make STSM a lot more useful for a larger variety of stages. With the help of my friend Aleks, a GUI was also developed that allows the tool to be used much easier.

Because the tool is not Sonic-specific, but could be used to generate shapes and tiles for a variety of 2D platforming games, I decided to rename it something more appropriate. I hope that now STSM can be used by even more people to create assets for their games quickly and easily.