More memory fixes.

app/lib/LevelBus.coffee

@@ -32,7 +32,7 @@ module.exports = class LevelBus extends Bus
     @fireScriptsRef = @fireRef?.child('scripts')
 
   setSession: (@session) ->
-    @session.on('change:multiplayer', @onMultiplayerChanged)
+    @session.on 'change:multiplayer', @onMultiplayerChanged, @
 
   onPoint: ->
     return true unless @session?.get('multiplayer')
@@ -198,7 +198,7 @@ module.exports = class LevelBus extends Bus
     @changedSessionProperties.chat = true
     @saveSession()
 
-  onMultiplayerChanged: =>
+  onMultiplayerChanged: ->
     @changedSessionProperties.multiplayer = true
     @session.updatePermissions()
     @changedSessionProperties.permissions = true
@@ -217,3 +217,7 @@ module.exports = class LevelBus extends Bus
     # don't let what the server returns overwrite changes since the save began
     tempSession = new LevelSession _id:@session.id
     tempSession.save(patch, {patch: true})
+
+  destroy: ->
+    super()
+    @session.off 'change:multiplayer', @onMultiplayerChanged, @

app/lib/LevelLoader.coffee

@@ -55,12 +55,13 @@ module.exports = class LevelLoader extends CocoClass
     @supermodel.on 'loaded-one', @onSupermodelLoadedOne
     @supermodel.once 'error', @onSupermodelError
     @level = @supermodel.getModel(Level, @levelID) or new Level _id: @levelID
+    levelID = @levelID
 
-    @supermodel.shouldPopulate = (model) =>
+    @supermodel.shouldPopulate = (model) ->
       # if left unchecked, the supermodel would load this level
       # and every level next on the chain. This limits the population
       handles = [model.id, model.get 'slug']
-      return model.constructor.className isnt "Level" or @levelID in handles
+      return model.constructor.className isnt "Level" or levelID in handles
 
     @supermodel.populateModel @level
 

app/lib/surface/Mark.coffee

@@ -20,6 +20,8 @@ module.exports = class Mark extends CocoClass
   destroy: ->
     @mark?.parent?.removeChild @mark
     super()
+    @markSprite?.destroy()
+    @sprite = null
 
   toString: -> "<Mark #{@name}: Sprite #{@sprite?.thang?.id ? 'None'}>"
 
@@ -119,6 +121,7 @@ module.exports = class Mark extends CocoClass
     markSprite = new CocoSprite @thangType, @thangType.spriteOptions
     markSprite.queueAction 'idle'
     @mark = markSprite.displayObject
+    @markSprite = markSprite
 
   update: (pos=null) ->
     return false unless @on

app/views/home_view.coffee

@@ -94,3 +94,7 @@ module.exports = class HomeView extends View
   didReappear: ->
     super()
     @turnOnStageUpdates()
+
+  destroy: ->
+    super()
+    @wizardSprite?.destroy()

app/views/play/level/modal/multiplayer_modal.coffee

@@ -13,7 +13,7 @@ module.exports = class MultiplayerModal extends View
   constructor: (options) ->
     super(options)
     @session = options.session
-    @session.on 'change:multiplayer', @updateLinkSection
+    @session.on 'change:multiplayer', @updateLinkSection, @
     @playableTeams = options.playableTeams
 
   getRenderData: ->
@@ -32,7 +32,7 @@ module.exports = class MultiplayerModal extends View
   onClickLink: (e) ->
     e.target.select()
 
-  updateLinkSection: =>
+  updateLinkSection: ->
     multiplayer = @$el.find('#multiplayer').prop('checked')
     la = @$el.find('#link-area')
     if multiplayer then la.show() else la.hide()
@@ -41,3 +41,7 @@ module.exports = class MultiplayerModal extends View
   onHidden: ->
     multiplayer = Boolean(@$el.find('#multiplayer').prop('checked'))
     @session.set('multiplayer', multiplayer)
+
+  destroy: ->
+    super()
+    @session.off 'change:multiplayer', @updateLinkSection, @

app/views/play/level/tome/spell.coffee

@@ -30,6 +30,7 @@ module.exports = class Spell
   destroy: ->
     @view.destroy()
     @tabView.destroy()
+    @thangs = null
 
   addThang: (thang) ->
     if @thangs[thang.id]

app/views/play/level/tome/spell_view.coffee

@@ -35,7 +35,7 @@ module.exports = class SpellView extends View
   constructor: (options) ->
     super options
     @session = options.session
-    @session.on 'change:multiplayer', @onMultiplayerChanged
+    @session.on 'change:multiplayer', @onMultiplayerChanged, @
     @spell = options.spell
     @problems = {}
     @writable = false unless me.team in @spell.permissions.readwrite  # TODO: make this do anything
@@ -123,7 +123,7 @@ module.exports = class SpellView extends View
     @ace.setValue @spell.source
     @ace.clearSelection()
 
-  onMultiplayerChanged: =>
+  onMultiplayerChanged: ->
     if @session.get 'multiplayer'
       @createFirepad()
     else
@@ -502,4 +502,7 @@ module.exports = class SpellView extends View
     super()
     @firepad?.dispose()
     @ace.destroy()
+    @ace = null
     @debugView?.destroy()
+    @spell = null
+    @session.off 'change:multiplayer', @onMultiplayerChanged, @

app/views/play/level_view.coffee

@@ -134,7 +134,7 @@ module.exports = class PlayLevelView extends View
     @initScriptManager()
     @insertSubviews()
     @initVolume()
-    @session.on 'change:multiplayer', @onMultiplayerChanged
+    @session.on 'change:multiplayer', @onMultiplayerChanged, @
     @originalSessionState = _.cloneDeep(@session.get('state'))
     @register()
     @controlBar.setBus(@bus)
@@ -302,7 +302,7 @@ module.exports = class PlayLevelView extends View
     $('#pointer').css('opacity', 0.0)
     clearInterval(@pointerInterval)
 
-  onMultiplayerChanged: (e) =>
+  onMultiplayerChanged: (e) ->
     if @session.get('multiplayer')
       @bus.connect()
     else
@@ -391,3 +391,4 @@ module.exports = class PlayLevelView extends View
     @bus?.destroy()
     #@instance.save() unless @instance.loading
     console.profileEnd?() if PROFILE_ME
+    @session.off 'change:multiplayer', @onMultiplayerChanged, @