Faster Harder Stronger (v0.87a)

The overall pace of the game has been significantly accelerated. The bunnies now move about twice as fast as before. This has affected: [list] [*]gravity, [*]water, [*]jumping, [*]the strength of physics-based weapons, [*]recoil and explosion forces, [*]missile and grenade launching strength, [*]weapon mobility parameter, [*]collision damage parameters. [/list] Minor improvements: [list] [*]precise laser guiding of the bazooka missile, [*]more dynamic bullet trail, [*]performance optimizations, [*]small fixes. [/list]