P1 - Lego compatible drag feeder

The changes looked good.  I've re-rendered everything and pushed it up to Github.

I have a 3D printer again, so I printed some of these out.

The pins were too small between the base and the top bit to print reliably.  I've made them bigger.

I also corrected the math for positioning the pick and feed holes so it scales correctly for different tape widths.

I'm printing them out again before I post the updated code, but the C1 end effector still has a couple hours to go for it's latest revision.

I took the time to automate the generation of the STL files for the drag feeder.

The parts for the other related projects are pretty much one-offs, but for the drag feeder, I have to render things out at a number of heights and lengths so it made sense.

Updated source and the rendered files are now up on Github.

Made the source more modular and added lead in and lead out angled bits on the parts so the tape won't get hung up on the edge from a slight misalignment.

Source is updated in the Github.  Have not rendered the new models yet to match.  Later today.