Fixed #519, pressing esc while loading level, and CocoSprites updating actions and other things unnecessarily while paused. Watch for bugs with that last one.

app/lib/surface/CocoSprite.coffee

@@ -167,10 +167,11 @@ module.exports = CocoSprite = class CocoSprite extends CocoClass
     @imageObject?.play?()
     mark.play() for name, mark of @marks
 
-  update: ->
+  update: (frameChanged) ->
     # Gets the sprite to reflect what the current state of the thangs and surface are
     return if @stillLoading
     @updatePosition()
+    return unless frameChanged
     @updateScale()
     @updateAlpha()
     @updateRotation()

app/lib/surface/SpriteBoss.coffee

@@ -158,7 +158,7 @@ module.exports = class SpriteBoss extends CocoClass
 
   update: (frameChanged) ->
     @adjustSpriteExistence() if frameChanged
-    sprite.update() for thangID, sprite of @sprites
+    sprite.update frameChanged for thangID, sprite of @sprites
     @updateSelection()
     @spriteLayers["Default"].updateLayerOrder()
     @cache()
@@ -181,7 +181,7 @@ module.exports = class SpriteBoss extends CocoClass
       sprite.hasMoved = false
       @removeSprite sprite if missing
     @cache true if updateCache and @cached
-    
+
     # mainly for handling selecting thangs from session when the thang is not always in existence
     if @willSelectThang and @sprites[@willSelectThang[0]]
       @selectThang @willSelectThang...
@@ -212,12 +212,12 @@ module.exports = class SpriteBoss extends CocoClass
     @play()
 
   onCastSpells: -> @stop()
-  
+
   play: ->
     sprite.imageObject.play() for thangID, sprite of @sprites
     @selectionMark?.play()
     @targetMark?.play()
-  
+
   stop: ->
     sprite.imageObject.stop() for thangID, sprite of @sprites
     @selectionMark?.stop()

app/lib/surface/Surface.coffee

@@ -208,10 +208,12 @@ module.exports = Surface = class Surface extends CocoClass
       @onFramesScrubbed()  # For performance, don't play these for instant transitions.
       onTweenEnd()
 
+    return unless @loaded
     @updateState true
     @onFrameChanged()
 
   onFramesScrubbed: (e) =>
+    return unless @loaded
     if e
       # Gotta play all the sounds when scrubbing (but not when doing an immediate transition).
       rising = @currentFrame > @lastFrame

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

@@ -44,6 +44,7 @@ module.exports = class SpellPaletteView extends View
     allDocs = {}
     for lc in lcs
       for doc in (lc.get('propertyDocumentation') ? [])
+        doc = _.clone doc
         allDocs['__' + doc.name] ?= []
         allDocs['__' + doc.name].push doc
         if doc.type is 'snippet' then doc.owner = 'snippets'