Updated wording in Cache demo.
Updated controls in Transform demo

Signed-off-by: Lanny McNie <lanny@gskinner.com>
Updated documentation.

Signed-off-by: Lanny McNie <lanny@gskinner.com>
Updated clearRect usages to increase by 1 pixel to avoid Android crashes.

Signed-off-by: Lanny McNie <lanny@gskinner.com>