Rewrite of card scripts completely

Reduce the card specific code to what's needed.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

scripts/raspberrypi-card-write.sh

@@ -0,0 +1,14 @@
+#! /bin/bash
+
+# raspberrypi-card-write.sh
+# (c) Copyright 2018 Andreas Müller <schnitzeltony@gmail.com>
+# Licensed under terms of GPLv2
+#
+# This script writes image to sdcard and aligns rootfs partition to max size.
+
+# Includes
+. `dirname $0`/include/common-helpers.inc
+. `dirname $0`/include/card-helpers.inc
+. `dirname $0`/include/machine-raspberrypi.inc
+
+StartCardWrite