More documentation updates
Merge pull request #13 from linas/mo

More documentation updates
Added NRegionsOfInterest - an input for multiple ROI, compatible with pi_vision.
Hash-color newly created inputs to distinguish groups.
Two parallel instances of pi_vision as inputs supported
Adjusted TrackDev to work with new inputs.
Merge pull request #14 from Gaboose/master

Blender can show all detected faces by pi_vision