renamed gitem_t -> itemShared_t
renamed iweapon_t.wT -> iweapon_t.weaponType
renamed wp_grenade_launcher -> wp_grenadel
renamed wp_rocket_launcher -> wp_rocketl
cleaned up bg_itemlist
renamed GT_SINGLE_PLAYER -> GT_CAMPAIGN
added build target for ZGAME
reduced MAX_ITEM_MODELS to 2 (3 and 4 are never used)
removed g_mem.c from ZGAME (no longer used)