Remove accidental debug log line

Change-Id: I8a59e584d1448b7cedd9df2552589c2007935f41
Support local caching

The service will now check to see if something is already in the
queue and rendering / rendered. This saves us from rerendering the
same thing twice when we dont have to.

Change-Id: I8881f18691dfc8f3cf594339fc5fde7eca9c7000