Added the unique skill "Stout arm"

Marty, Gomez, Ralph and some enemy units now have the unique skill "Stout arm". Holders of this skill can always ignore the weight of weapons regardless of their Str.

This new skill was given to those who in the original who had superior build and never cared about the weight of weapons. Marty, in particular, will not grow much Str, and this skill will allow him to move more like the original.