cleanup Makefile, extract image-data, add init-script, replace generic image with a smaller one (320x320)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@15812 3c298f89-4303-0410-b956-a3cf2f4a3e73

utils/psplash/files/init

@@ -0,0 +1,11 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2006 OpenWrt.org
+START=05
+
+start() {
+    psplash &
+}
+
+stop() {
+    killall psplash
+}