Fixed bobbing. Increased LayerAdapter cleanup vengeancy. Allow dragging without snapping when playback is at the end.

app/lib/surface/Lank.coffee

@@ -171,8 +171,9 @@ module.exports = Lank = class Lank extends CocoClass
   update: (frameChanged) ->
     # Gets the sprite to reflect what the current state of the thangs and surface are
     return false if @stillLoading
+    if (frameChanged and @thang and @thang.stateChanged) or (@thang and @thang.bobHeight) or @notOfThisWorld
+      @updatePosition()
     return false if @thang and @thang.stateChanged is false
-    @updatePosition() if frameChanged or @thang.bobHeight or @notOfThisWorld
     frameChanged = frameChanged or @targetScaleFactorX isnt @scaleFactorX or @targetScaleFactorY isnt @scaleFactorY
     if frameChanged
       @handledDisplayEvents = {}

app/lib/surface/LankBoss.coffee

@@ -47,6 +47,7 @@ module.exports = class LankBoss extends CocoClass
     @removeLank lank for thangID, lank of @lanks
     @targetMark?.destroy()
     @selectionMark?.destroy()
+    lankLayer.destroy() for lankLayer in _.values @layerAdapters
     super()
 
   toString: -> "<LankBoss: #{@lankArray.length} lanks>"

app/lib/surface/Surface.coffee

@@ -229,7 +229,7 @@ module.exports = Surface = class Surface extends CocoClass
 
   updateState: (frameChanged) ->
     # world state must have been restored in @restoreWorldState
-    if @playing and @heroLank and not @mouseIsDown and @camera.newTarget isnt @heroLank.sprite and @camera.target isnt @heroLank.sprite
+    if @playing and @currentFrame < @world.frames.length - 1 and @heroLank and not @mouseIsDown and @camera.newTarget isnt @heroLank.sprite and @camera.target isnt @heroLank.sprite
       @camera.zoomTo @heroLank.sprite, @camera.zoom, 750
     @camera.updateZoom()
     @lankBoss.update frameChanged