Add texture support; refactor entity configuration system
Ensure one-time shader load; add support for RTT; fix some serious bugs
Add postprocessing support
Add invert and blur postprocessing shaders
Add postprocessing effects
Allow inline predefined programs for post processing config
Add motion blur
Add depth texture support, redo motion blur shader
Introduce wrapper for uniform and attribute linking
Add gouraud shader, add anti-aliasing shader
Fix specular lighting
Add multiple texture support
Add preloading animation
Refactor attributes and events, add FPS counter