More kivy way of drawing arrows that will also make it easier to make a dummy arrow
decruft
get a fake arrow lookin thing to display correct on the arrow toggle button

in the process fix one of the special cases in get_points
Actually the get_points special case was fine, I just forgot the default widget size was (100, 100)
misleading docstring was misleading
You can now connect places with portals in ELiDE

I had to fix some stuff in LiSE to make this happen. I want to make the collision detection more detailed; right now it's too easy to grab Things by accident.