added> Texture based classes.
added> Int32Array for int uniforms.
update> Color class with extra methods
update> GraphicsContext with Texture and Uniforms features
update> GraphicsContext with new Screen features.
update> Activity now has a flag to run inside the rendering context.
update> TextureContext now handle almost all features of 0.5.5
update> MaterialContext now handles uniforms and optimized material binding.