First working and releasable version of the gun game mode.
It can still be worked on to add support for dvars instead of configuring level scope variables, also support other game modes among other possible improvements
- Fixed killstreaks not working properly for classes with support or assault killstreaks
- Fixed throwing knife not given when using a class with a lethal that's not a throwing knife
- Added optional time limit parameter to SetGameLimits()
- Added bot dvars
