Create new Source type MultiFile

MultiFileSource plays a sequence of numbered images.

Overlay.cpp

@@ -0,0 +1,23 @@
+#include "Overlay.h"
+
+Overlay::Overlay()
+{
+
+}
+
+SnapshotOverlay::SnapshotOverlay() : Overlay()
+{
+
+}
+
+void SnapshotOverlay::draw()
+{
+
+}
+
+
+void SnapshotOverlay::update (float dt)
+{
+
+
+}