More memory cleanup.

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

@@ -27,6 +27,10 @@ module.exports = class Spell
     @tabView = new SpellListTabEntryView spell: @, supermodel: @supermodel
     @tabView.render()
     
+  destroy: ->
+    @view.destroy()
+    @tabView.destroy()
+
   addThang: (thang) ->
     if @thangs[thang.id]
       @thangs[thang.id].thang = thang

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

@@ -166,4 +166,4 @@ module.exports = class TomeView extends View
   destroy: ->
     super()
     for spellKey, spell of @spells
-      spell.view.destroy()
+      spell.destroy()