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Presenting PyRobot

I've been working on a re-write of iRobot's openinterface.py that is, hopefully, cleaner and more compatible with older Roombas in addition to the Create. I call it PyRobot. And now, it has a home.

Currently, PyRobot is not nearly as feature complete as openinterface.py. But I expect that will change as I start playing more with my robot army maids.
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