Initial dump of BfA compatibility

Updated for:
- SPELL_POWER_* constants becoming Enum.PowerType.*
- Rank no longer existing in return values for UnitAura, UnitBuff, UnitDebuff, UnitCastingInfo, UnitChannelInfo
- UNIT_POWER event becoming UNIT_POWER_UPDATE
- UnitPopupFrames no longer existing
- Removed events: PLAYER_PET_CHANGED, UNIT_MAXPOWER, PET_BAR_CHANGED, UNIT_DYNAMIC_FLAGS
- Texture return value from UnitAura type changing (name -> id)
- All Warlock specializations using soul shards
- Death Knight rune changes

Haven't tested all classes/specializations yet, so I'm sure I missed some stuff.
Probably need to add support for the new circular cooldown wipe flourish added in the base client.
Saw a problem with cooldown flashes being delayed on DK runes becoming available that probably need to be fixed.

modules/FocusMana.lua

@@ -1,6 +1,14 @@
 local L = LibStub("AceLocale-3.0"):GetLocale("IceHUD", false)
 local FocusMana = IceCore_CreateClass(IceUnitBar)
 
+local SPELL_POWER_RAGE = SPELL_POWER_RAGE
+local SPELL_POWER_FOCUS = SPELL_POWER_FOCUS
+local SPELL_POWER_ENERGY = SPELL_POWER_ENERGY
+if IceHUD.WowVer >= 80000 then
+	SPELL_POWER_RAGE = Enum.PowerType.Rage
+	SPELL_POWER_FOCUS = Enum.PowerType.Focus
+	SPELL_POWER_ENERGY = Enum.PowerType.Energy
+end
 
 -- Constructor --
 function FocusMana.prototype:init()
@@ -32,8 +40,10 @@ function FocusMana.prototype:Enable(core)
 	FocusMana.super.prototype.Enable(self, core)
 
 	if IceHUD.WowVer >= 40000 then
-		self:RegisterEvent("UNIT_POWER", "UpdateEvent")
-		self:RegisterEvent("UNIT_MAXPOWER", "UpdateEvent")
+		self:RegisterEvent(IceHUD.UnitPowerEvent, "UpdateEvent")
+		if IceHUD.WowVer < 80000 then
+			self:RegisterEvent("UNIT_MAXPOWER", "UpdateEvent")
+		end
 	else
 		self:RegisterEvent("UNIT_MANA", "UpdateEvent")
 		self:RegisterEvent("UNIT_MAXMANA", "UpdateEvent")