rwaldron / johnny-five / 2657

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Pull #1400

travis-ci

Fix sycnchronous animation queues

#1376 only fixed the problem when animation segments were enqueued in seperate passes through the event loop.  When two animation segments were enqueued on the same pass through the even loop we were starting both segments because the isRunning state was not being set until nextTick.

This should fix all that. I've updated some of the tests which I believe were written in a non-intuitive manner because of this bug. Instead of really understanding the problem I had just written the tests in a way that made them pass. There's probably a name for this sort of behavior. If not, we should invent a name.

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