Text renderer

[athaun]

I would greatly appreciate a thorough review of my code, and I do realize it is quite alot of code to review. From what I can see, git is confused about some files, and has marked them as completely changed, which makes it much more difficult to review. The files to focus your review on are as follows

• graphics/renderer/TextRenderer.java
• graphics/renderer/TextRendererBatch.java
• fonts/GlyphRenderer.java
• fonts/Glyph.java
• fonts/Font.java
• ecs/Text.java
• scene/Scene.java
• scenes/TextRenderingDemo.java

Notable changes in this commit are:

• Font renderer
• Additional documentation and author attribution
• Beginning to lay the groundwork for further UI.
• Disabling sprite rotation for now until we can come up with a cleaner solution (as discussed on discord)
• deprecating the DemoPlatformer scene - it needs to either be rewritten or removed before 1.0.

[Juyas]

I would approve of this, maybe add some structure tests to polish a little.