ghosts v2

• Added third-person camera for observer mode + support for emotes
• Added per-player option to always use the camera model
• Added ghost wailing mode (admin setting. Left/right click shoots a medic/take-cover beam)
• Collect ghosts with +USE (forces a ghost to follow you for a few seconds)
• Camera model is used instead of player.mdl when a player model isn't precached
• Fixed ghosts becoming solid or not rendering correctly after a while
• Fixed transparent textures on ghosts being completely invisible (gf_ump45)
• Fixed ghost HUD info showing the wrong values