Return of Soul. Balancing. Tokens.

Changelog:
 1. Return of Soul:
  - SoulShot now returns after being shot.
  - Returns more transparent.
  - Returns twice as fast as base_speed.
 2. Balancing:
  - Rats faster.
  - Heavies faster.
  - Rogues slower.
 3. Tokens:
  - Should "theoretically" work.
  - I guess we can say it's going to be a delightful surprise when we find out
    whether it works or not.
  - Haven't made them walk when idle yet. That involves too many
    "variables" that we may or may not want them to change. We'll see.

Notes:
 - That ticks off:
  II. Soul goes back to body (more transparent when going back).
  IV. Faster rats. Faster heavies. Maybe: slower rogues.
  III. Creatures walk (slower velociy) idly by. Note to self: 2 Tokens.
 - That's pretty much everything ticked off my list.
 - I plan on working on my Bonus item now:
  o Multiple path points for moving platforms.