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/slowcast.lua

@@ -0,0 +1,9 @@
+require("modifiers")
+require("battleutils")
+
+--Increases range of a single spell, no clue by how much, 25% is a random guess
+--It isn't clear if it has an effect on the aoe portion of skills or just the normal range, i've seen people on the OF say both.
+--It also increased height of skills
+function onMagicCast(effect, caster, skill)
+    skill.castTimeMs = skill.castTimeMs * 1.5;
+end;