Melee-oriented martial arts (part two)

Added Pentjak Silat, making it a dodge-oriented style that buffs to-hit, leading to a variety of critical hits. Added the Kris in as well, just because it appears to be an iconic weapon associated with the style.

Tweaked Eskrima with a stacking damage buff and a 'free strike' crit so that it becomes more powerful as you keep attacking, and continually lands quick hits. 

Moved damage calculations around so that martial arts multipliers don't just get soaked by armor without any effect. Fixed bug that had disabled ondodge buffs. Replicated older attack_boost functionality so that martial arts to-hit buffs also increase crit chances. A subsequent balance pass is going to be needed, I'm sure, as some of these bug fixes and tweaks are going to make melee players more deadly.