Web worker#232

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stuartlynn wants to merge 2 commits intomasterfrom

Commits on Oct 27, 2015

Updating tileJson provider to use webworkers to process tiles when they are available. This is probably still not as efficient as it could be as we are not recycling workers.
stuartlynn
committed
Updating point renderer to support the new callback style for proccessTile. Not sure this is used any more but just to be safe.
stuartlynn
committed