mint-voyager: Fix attaching flash to weapon view model
mint-voyager: Weapon barrel fixes

Fix attaching barrel to view model.
Don't attach barrel to world model.
Don't spin barrel.
Support up to 4 barrels (4 used by arc_welder, 2 used by launcher).
mint-voyager: Fix trying to use bad weaponinfo

It was causing really long prediction in BotAimAtEnemy.
mint-voyager: Fix spawning CTF Flags

Origin is by the ground, but items have bounding box go down 15 units so was erroring stuck in solid.
mint-voyager: Don't have CTF flag bob and spin