Canvases and Images are now subclasses of the new Texture class.
Added setTexture and getTexture methods for Meshes, ParticleSystems, and SpriteBatches (the old set/getImage methods are deprecated but not removed.)
Canvas texture coordinates are no longer flipped.
Each shader contains a map of uniform name -> bound retainable Object. After
setting the uniform, sendImage() and sendCanvas() release() the Object with
the requested name (if present) and record the new Image/Canvas.
Related bugfix: Shader::attach() calls retain()/release() on the shader.
Alex Szpakowski
vrld
Alexander Szpakowski