Optimized MAT loadouts:
* Fixed: MAT spawned without a rocket in their tube. Had to be reloaded manually.
* Tweaked MAT loadout to make a significant difference between MAT and RAT:
MATG - light: 1 AT, 1 HE.
MATG - medium: 2AT, 1HE
MATG - heavy: 2AT, 2HE

AG mirrors these numbers.
NATO MAT (NLAW) has same numbers but AT only (so 2 AT for light etc.)
Merge pull request #382 from Wolfenswan/dev-MATloadout

Optimized MAT loadouts: