Gcode Script Pack 3

Stars, Fractals, and Gears, this update's all about manipulating groups of GCodes to produce complex geometry!

This is probably about as spaghettified as I'm willing to let the code get-- next script update will finally be modularized into tidy packages. Scripts in the next pack will also be able to take command-line arguments.

para_07: Star. Demonstrates a list of GCodes, which can then be manipulated together.

para_08: The Koch Snowflake. Demonstrates a recursive function which dra