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/sleep.lua

@@ -0,0 +1,12 @@
+require("modifiers")
+
+--Set magnitude to milliseconds that HF will reduce delay by
+function onGain(owner, effect, actionContainer)
+end;
+
+function onLose(owner, effect, actionContainer)
+end;
+
+function onDamageTaken(effect, attacker, defender, skill, action, actionContainer)
+    defender.statusEffects.RemoveStatusEffect(effect, actionContainer)
+end;