Remove cheat keys, they can be replaced by custom devkeys 1-12

Remove MAKING_VIDEO as well, when is the last time someone used that
Remove police & NotifyOfCrime
Support NoIntro config key for faster loading
Disable random factions for faster startup
Better error reporting using the OpenGL debug extension

You'll want an up to date version of GLEW and drivers for this (nvidia 305.53 and up).
Set max mipmap level to zero when not using mipmaps
I don't like having the Thruster nodes in the model system, so here's a start of some refactoring!