Changed config

Power-ups
- Increased speed of Ice Projectile to 30 from 20
- Decreased speed of ET to 15 from 20
//Thus the Ice Projectile is better for sniping ranged targets while the
ET is more useful against groups, especially since its AoE

Playing Field
- Slightly increased the height of the arena while drastically
decreasing the length of it
//This makes the playing field more cubical, which is useful for maps
like Rift (to avoid dividing the map with the wormhole). Another effect
is that players are more careful when accelerating since arena is
smaller, thus hopefully reducing the number of eliminations by the
players own mistake
Weight Classes

Added weight classes
- Light accelerates & turns faster, has quicker punch cooldown, but also
less mass & weaker punch
- Medium is medium
- Heavy accelerates & turns slower, and has longer punch cooldown, but
has more mass & more powerful punch
Merge remote-tracking branch 'origin/dev_OTHER' into dev