Fix for image cache

Cache is now disabled only for local images (server and file urls). You can optionally force using the cache by using layer. _alwaysUseImageCache.

framer/Components/DeviceComponent.coffee

@@ -261,7 +261,7 @@ class exports.DeviceComponent extends BaseClass
		else if not @_deviceImageUrl(@_deviceImageName())
			@phone.image  = ""
		else
			@phone._cacheImage = true
			@phone._alwaysUseImageCache = true
			@phone.image  = @_deviceImageUrl(@_deviceImageName())
			@phone.width  = @_device.deviceImageWidth
			@phone.height = @_device.deviceImageHeight

framer/Layer.coffee

@@ -53,7 +53,7 @@ class exports.Layer extends BaseClass
		# Special power setting for 2d rendering path. Only enable this
		# if you know what you are doing. See LayerStyle for more info.
		@_prefer2d = false
		@_cacheImage = true
		@_alwaysUseImageCache = false

		# We have to create the element before we set the defaults
		@_createElement()
@@ -547,18 +547,12 @@ class exports.Layer extends BaseClass
			# imageUrl = Config.baseUrl + imageUrl


			# See if we need to cache the image
			shoudUseImageCache = true
			print imageUrl
			print "@_cacheImage", @_cacheImage
			print "Utils.isLocalAssetUrl(imageUrl)", Utils.isLocalAssetUrl(imageUrl)

			# We can always disable the cache with this property
			if @_cacheImage is false
				shoudUseImageCache = false

			# If this is a file url, we don't use any cache
			else if Utils.isLocalAssetUrl(imageUrl)
				shoudUseImageCache = false

			if shoudUseImageCache is false
			if @_alwaysUseImageCache is false and Utils.isLocalAssetUrl(imageUrl)
				imageUrl += "?nocache=#{NoCacheDateKey}"

			# As an optimization, we will only use a loader
@@ -769,6 +763,8 @@ class exports.Layer extends BaseClass
		exportable: false
		get: ->
			@_draggable ?= new LayerDraggable(@)
		set: (value) ->
			@draggable.enabled = value if _.isBoolean(value)

	# anchor: ->
	# 	if not @_anchor