Border stuff

Rough draft. Works fine for now. Cut down on number of border blocks,
preferably. Switch to array for [line color, border color] instead of
using two separate variables?
Border 2: Electric Boogaloo

Got rid of some unneeded blocks, reorganized the rest, making the pen
tab a bit less cluttered. Also got rid of "get" in reporter blocks, per
normal csnap standard.
Border 3

Bordered Polygon blocks up, probably going to change names soon. Just
one more commit?
Revert "Border 3"

This reverts commit 5560da165df40e6b09d7d6d34f15860aa723f1b6.
Borders done

Finally pushed!