Changes to the ZONE mode : v1.30

[Connavar]

Wow, zone 125!!!
ProblemSolver, I think you solved a problem, now go and solve the 15 others!

(and great ideas about the color effects, I hope SL gives you a call
for the next zone update, since you're obviously the #1 specialist in the
world, having played the mode to death)

After reading your impressions, I decided to give Zone mode a try on AP, but
after a 3 months break, I couldn't play correctly anymore, died at zone 72.

However I did notice a few things:
- ship physics is worse than before, because it's uglier, instead of flying, the
ship is now bouncing, see it's like a kangaroo now.
Just because of that, the zone looks less impressive to me, but probably
improves ship stability so it's easier to beat zones (which is good to me).

- new lighting effects when going to a next zone speed, pretty well done but
a bit too overbright maybe; if you look at the ship it gets additional effects
as well