Adding the pimotion blog post

The pimotion project is a Python application running on the Raspberry PI leveraging the camera module to detect motion. It integrates with CloudApp and M2X to publish the captured motion stills to your M2X device stream.
:+1: http://writingcenter.unc.edu/handouts/semi-colons-colons-and-dashes/ <-- in favor of `:`

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