initial commit on new glow_worm project

I've created a new project for my Arduino base robotics architecture
called Glow Worm.  The major effort on this new branch is to
build a publish/subscribe architecture for sharing information
between nodes.  In Glow Worm, all plants, sensors and controllers
are generalize implementations of a Node.  A Node can then publish
and/or subscribe to as many different messages are required to
conduct its computational/control requirements
Working Glow_Worm based implementation of the Rover Plant controller