Fixed MTL keyword "tr"
Optimized OBJ loader

No longer loading same material twice
Improved Error system
Improved RenderTexture class
Improved Texture mipmap support
Improved Lighting
Fixed Render[Texture|Window] crash when released while on use
Fixed error message
Fixed Texture::Update behavior
Made static_assert useful
Made use of lambda functions
Fixed missing file
Added new RenderTechnique system
Added Sprite::SetTexture