Expand root filesystem at first boot

Fix #26

It involves a double boot because a reboot is needed
to refresh the partition table.

modules/ruggedpod/finish/files/etc/rc5.d/S00ExpandFilesystem

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -eux
+
+raspi-config --expand-rootfs
+
+rm -f /etc/rc5.d/S00ExpandFilesystem
+reboot

modules/ruggedpod/finish/scripts/10-make-script-executatble.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -ex
+
+chmod +x /etc/rc5.d/S00ExpandFilesystem

modules/ruggedpod/provision/files/etc/apt/sources.list

@@ -0,0 +1,2 @@
+deb http://archive.raspbian.org/raspbian jessie main contrib non-free
+deb http://archive.raspberrypi.org/debian jessie main

modules/ruggedpod/provision/scripts/00-update-apt.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -eux
+
+apt-get update

modules/ruggedpod/provision/scripts/05-install-raspi-config.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -eux
+
+apt-get install -y --force-yes raspi-config