Combat fixes and additions

Add default status gain and loss ids for status effects so buffs and
debuffs can have different ids.
Add sleep, slow, and slowcast

Fix sacred prism not slowing casts
Fix some incorrect text ids in battle commands

data/scripts/effects/dark_seal2.lua

@@ -5,7 +5,6 @@ require("battleutils")
 --There isn't really any information on this, but due to the fact it falls off BEFORE the target is hit, 
 --I'm assuming it increases a spell's accuracy modifier instead of giving actual magic accuracy
 function onCommandStart(effect, owner, skill, actionContainer)
-    print('dark seal')
     if skill.GetActionType() == ActionType.Magic then
         --50 is random guess.
         skill.accuracyModifier = skill.accuracyModifier + 50;