Remove obsolete and unnecessary animated and double buffered values from material

Remove obsolete and unnecessary animated and double buffered values from material

- material color removed since actor color will always override if (because we can use same renderer with multiple actors)
- blend color changed to pointer in scene graph and non animateable
- blending options cached in event thread and not double buffered in update as they are almost never ever changed

Change-Id: Iec99b52f1bd5ce2d38cd2fa8888117a326383fe4