Updated object location and visual guidance working well

I have added and enhanced new shape-finding/fitting algorithms. This includes one Cython module for the
inner search loops. Also added is a tool to create the shape-fitting templates.
With this new capability, I'm able to reliably locate the tip of a drill bit and verify its position on a work piece down to about 1/4th of a millimeter.
So now one can use a $1000 robot to acheive $100,000 precision!