SCRIPTS: tweak monstertpmoves::applyPlayerResistance, status resist mods...

... get applied to all resistance tiers. if status effect is resisted to quarter tier or higher it has no effect. create new function applyResistanceEffect in magic.lua - it's a copy of applyResistance with the logic copied from applyPlayerResistance for status resist mods. apply new resist function to scripts for slow and paralyze spells, apply new formula for paralyze potency and make duration of paralyze I random

the resist tiers higher than half are derived from the half rate anyway, so I just applied the resistmod to the half tier and then derived the higher tiers afterwards - this method used in monstertpmoves.lua and magic.lua

para potency formula: (2 * (pMND + dMND)) / 10 
sourced from: http://www.bluegartr.com/threads/83846-Extensive-Paralyze-I-Testing