update TSQ for iOS 6, and make labels transparent.

Update TSQ - not sure if we should include this? Jeremy already eliminated the warning, and this diverges further from the root branch. 

Make labels transparent - I would be worried about performance, but it seems ok on my device and the normal cells are already transparent. We get weird glifs by reusing the background pattern. At the same time this isn't probably something that should get pushed up to the root branch (from Square) either. But we need this fix locally.