Fixes some stuff. If you had problems with a mapset before, try it now.
- Fixed chaingun muzzleflash not being bright
- Experimented with casing speed, boosted FPS of casings
- Fixed shotgun HUD sprite having a grey pixel
- Reworded Thi's ability blurb
- Fixed SSG flash being out of sync when playing Lorelei
- Fixed black screen when attempting to play with certain mapsets