Minimal Working System

[Mnenmenth]

Most notable changes:

• Re-loadable states and data for GlObjects
• GlObjectManager to go own GlObjects and hand out references to them
• RenderLoop struct/system to handle the render loop and WebGL context loss/restoration
• Input capture system
• Texture2D shader & WebGL wrapper to replace using raw colors
• Buffer variants are now defined with a macro rather than a parameter in the constructor function so that each buffer variant has its own concrete type