Better team color configuration

[blast007]

Currently there is minimal support for changing team colors on radar and on untextured tanks. It would be nice if there was a menu that would allow setting radar/tank colors, and possibly have some presets. It would also be nice if the tank textures were colored dynamically so that you wouldn't have to alter texture files to change the shade of color.

• [x] Better handling of the BZDB variables for radar and tank colors (making them first class BZDB variables instead of only checking at startup)
• [x] Adding support for observer, hunter, and rabbit teams
• [ ] Menu to control radar/tank colors
• [ ] Dynamically colored textures
• [ ] Selectable camouflage patterns per-team