Added Sensor Streaming + Locator tracking#1

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abramhindle wants to merge 3 commits intoedmontongo:masterfrom

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Commits on Sep 8, 2014

Handle locator stuff with async streaming. see http://orbotixinc.github.io/Sphero-Docs/docs/sphero-api/bootloader-and-sphero.html
abramhindle
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Locator now is sort of working. Locator example added.
abramhindle
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Commits on Sep 26, 2014

Make Sphero Header reading more sane -- align to 0xff 0xff and 0xff 0xfe
abramhindle
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