Flak Remington Overhaul

-Reloads
-Flak Grenade for Altfire
-Altfire
-Reloads

100% finished. see effects/casings for added flak bomb shell.
Added flak slug casings

nuf said
whoops. forgot to bracket

added bracket at end of shell
Merge pull request #1 from CruduxCruo/snarboo

Merging Crudux Cruo's Flak Shotgun Overhaul