v0.4.0

Changes:

• Codebase completely rewritten from the ground up
• New model loading library to improve load times
• Greatly expanded GUI allows loading models/skyboxes during runtime, controlling the angle and color of the directional light, and adjusting the field-of-view and gamma levels
• Greatly optimized CPU-side performance leading to observed fps improvements of up to 250%
• Improved accuracy in lighting calculations to mitigate visual artifacting
• Resizable window