Add CleanState methods to classes implementing state for the simulator.

diff --git a/OvaleAura.lua b/OvaleAura.lua
index aee9d36..f06ffcf 100644
--- a/OvaleAura.lua
+++ b/OvaleAura.lua
@@ -514,6 +514,13 @@ function OvaleAura:ResetState(state)
 	state.serial = state.serial + 1
 end

+-- Release state resources prior to removing from the simulator.
+function OvaleAura:CleanState(state)
+	for guid in pairs(state.aura) do
+		RemoveAurasOnGUID(state.aura, guid)
+	end
+end
+
 -- Apply the effects of the spell on the player's state, assuming the spellcast completes.
 function OvaleAura:ApplySpellAfterCast(state, spellId, targetGUID, startCast, endCast, nextCast, isChanneled, nocd, spellcast)
 	local si = OvaleData.spellInfo[spellId]
diff --git a/OvaleCooldown.lua b/OvaleCooldown.lua
index f4f21ac..412fa51 100644
--- a/OvaleCooldown.lua
+++ b/OvaleCooldown.lua
@@ -112,6 +112,16 @@ function OvaleCooldown:ResetState(state)
 	end
 end

+-- Release state resources prior to removing from the simulator.
+function OvaleCooldown:CleanState(state)
+	for spellId, cd in pairs(state.cd) do
+		for k in pairs(cd) do
+			cd[k] = nil
+		end
+		state.cd[spellId] = nil
+	end
+end
+
 -- Apply the effects of the spell on the player's state, assuming the spellcast completes.
 function OvaleCooldown:ApplySpellAfterCast(state, spellId, targetGUID, startCast, endCast, nextCast, isChanneled, nocd, spellcast)
 	local si = OvaleData.spellInfo[spellId]
diff --git a/OvaleFuture.lua b/OvaleFuture.lua
index 8720435..6012328 100644
--- a/OvaleFuture.lua
+++ b/OvaleFuture.lua
@@ -599,6 +599,13 @@ function OvaleFuture:ResetState(state)
 	end
 end

+-- Release state resources prior to removing from the simulator.
+function OvaleFuture:CleanState(state)
+	for k in pairs(state.counter) do
+		state.counter[k] = nil
+	end
+end
+
 -- Apply the effects of the spell at the start of the spellcast.
 function OvaleFuture:ApplySpellStartCast(state, spellId, targetGUID, startCast, endCast, nextCast, isChanneled, nocd, spellcast)
 	local si = OvaleData.spellInfo[spellId]
diff --git a/OvalePaperDoll.lua b/OvalePaperDoll.lua
index 9e1692c..5aa9710 100644
--- a/OvalePaperDoll.lua
+++ b/OvalePaperDoll.lua
@@ -508,6 +508,11 @@ function OvalePaperDoll:ResetState(state)
 	end
 	state.snapshot = state.snapshot or self_pool:GetReference(self.snapshot)
 end
+
+-- Release state resources prior to removing from the simulator.
+function OvalePaperDoll:CleanState(state)
+	self_pool:ReleaseReference(state.snapshot)
+end
 --</public-static-methods>

 --<state-methods>
diff --git a/OvalePower.lua b/OvalePower.lua
index dded77d..c9dfca5 100644
--- a/OvalePower.lua
+++ b/OvalePower.lua
@@ -242,6 +242,16 @@ function OvalePower:ResetState(state)
 	end
 end

+-- Release state resources prior to removing from the simulator.
+function OvalePower:CleanState(state)
+	for powerType in pairs(self.POWER_INFO) do
+		state[powerType] = nil
+	end
+	for k in pairs(state.powerRate) do
+		state.powerRate[k] = nil
+	end
+end
+
 -- Apply the effects of the spell on the player's state, assuming the spellcast completes.
 function OvalePower:ApplySpellAfterCast(state, spellId, targetGUID, startCast, endCast, nextCast, isChanneled, nocd, spellcast)
 	local si = OvaleData.spellInfo[spellId]
diff --git a/OvaleRunes.lua b/OvaleRunes.lua
index 99c4c0f..aa37d6d 100644
--- a/OvaleRunes.lua
+++ b/OvaleRunes.lua
@@ -203,6 +203,16 @@ function OvaleRunes:ResetState(state)
 	end
 end

+-- Release state resources prior to removing from the simulator.
+function OvaleRunes:CleanState(state)
+	for slot, rune in pairs(state.rune) do
+		for k in pairs(rune) do
+			rune[k] = nil
+		end
+		state.rune[slot] = nil
+	end
+end
+
 -- Apply the effects of the spell on the player's state, assuming the spellcast completes.
 function OvaleRunes:ApplySpellAfterCast(state, spellId, targetGUID, startCast, endCast, nextCast, isChanneled, nocd, spellcast)
 	local si = OvaleData.spellInfo[spellId]
diff --git a/OvaleState.lua b/OvaleState.lua
index cc4dcfa..e162cce 100644
--- a/OvaleState.lua
+++ b/OvaleState.lua
@@ -71,6 +71,11 @@ function OvaleState:UnregisterState(addon)
 	end
 	self_stateModules = stateModules

+	-- Release resources used by the state machine managed by the addon.
+	if addon.CleanState then
+		addon:CleanState(self.state)
+	end
+
 	-- Remove mix-in methods from addon's state prototype.
 	local statePrototype = self_statePrototype[addon]
 	for k in pairs(statePrototype) do