Use GIF files for effects (#477)

* Add new Effects

* add schema file for gif based effects

* add background color to snake effect

* add background color to snake effect

* Update schema file for snake effect

* Add function getImage

* add function getImage

* optimize lights.gif

* Add format to GIF schema

effects/gif.py

@@ -0,0 +1,16 @@
+import os, hyperion, time
+
+# Get the parameters
+imageFile = hyperion.args.get('image')
+framesPerSecond = float(hyperion.args.get('fps', 25))
+reverse       = bool(hyperion.args.get('reverse', False))
+
+sleepTime = 1./framesPerSecond
+if imageFile:
+	imageList = list(reversed(hyperion.getImage(imageFile))) if reverse else hyperion.getImage(imageFile)
+
+# Start the write data loop
+while not hyperion.abort() and imageList:
+	for image in imageList:
+		hyperion.setImage(image.imageWidth, image.imageHeight, image.imageData)
+		time.sleep(sleepTime)