Fixed a crash related to rendering static props

Case insensitive search for singleplayer files

Fixed addons breaking properties system clientside

Fixed a server crash when maxplayers is set in server.cfg and the command line

Made Combine Gunship aim at player's center so it can actually hit players

Fixed Combine APC bullet tracer coming from the wrong attachment

Fixed combine APC rockets going over player's head with certain hold types

Fixed a crash with DMX unserializer when external references are used