Fixed trailing ' in precache entry for weapon_chaingun.
Added sk_plasma_rifle_life_bounce and sk_plasma_rifle_life_spread cvars to
missionpack DLL to control time-to-remove of plasma rifle projectiles.
Added SAVEGAME_DLLNAME specific to Citadel builds of missionpack DLL.
Added support for building a version of missionpack DLL specific to Quake2Evolved v0.40b.
Added missing bounds checks for layout script commands.
Fixed baseq2 paths in non-KMQ2 implementation for alias script loading, Lazarus text box loading, and GameDirRelativePath()/SavegameDirRelativePath() functions.