This makes it worth it so you don't wait till you're on ground

The impulse is fairly weak, but it has no cooldown (of course). As long
as you can reliably click on them, you can keep dragging them around.
This builds charge.

Portal now COSTS charge, rather than gaining it, so that you bully
people until you can build a portal.

Hero 0 speeds up especially quickly!

This reverts commit 22cf954991.

While on wall, if you press jump, you leap up and away from the wall

If you do so immediately after leaving the wall (<tolerance=.150s), it
still works

There however were some bugs that came with this, so I'm switching to
master to explore this.

This gives greater flexibility and stops some of those especially
annoying bugs