giving RenderJobCreator more responsibilities
moving process into the sqs object
creates a worker that takes queue and job to process
adds multiprocess and trapping all children processes
adds configurable worker count and number of messages to read
removes unused variables
oops .. removes duplicate line
adding dependency
removing default None in worker constructor
deflaking
adds configure options into the sample config file
Merge pull request #6 from mapzen/baldur/process-in-threads

Baldur/process in threads
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