adds 3 new types of shotgun ammo. make them by crafting the special shell in RND, and then using table-crafting to make the unique ammo.dmi
meteorshot, made with compressed matter cartridges
pulse slugs, shotgun rounds with the properties of a laser weapon.
dragonsbreath rounds, area-of-effect flame weapons.
renames ammunition/bullets.dm to ammunition/ammo_casings.dm, which is more accurate
splits RND designs up into their own files