Update 0.2.2: Shaders

I've been busy with other life things for a few days, but I do have this update to push that includes my first attempts at some post processing using shaders.

• Pixellation
• Scanlines, toggelable through the settings menu
• 24 color mode, goes down to 4 color mode when you take damage for a second
• Similarly, some screen blurring and contrast adjustment when you take damage.