Tweaks the Kevlar.

Nerfed the generic vest and added several military grade vests plus
spawning menus, craft/decraft, and new materials to go with the vests.
(as well as added the "new" materials to their proper things.)
Wording fix.
Spelling, Grammar, and Spawn Chance Fixes
Nerfed the hell out of the Hard Plating

Also fixed a spelling error, made the difference between a dinner plate
and an armor plate more obvious, rebalanced the other MBR Vests,
rebalanced PA, and removed the SKINTIGHT flag from the helmet netting.
Merge pull request #4645 from EkarusRyndren/MoreMilArmor

Bullet Resistant Vest Re-Work