Added missing install script

pkg/common/duetpimanagementplugin/opt/dsf/plugins/DuetPiManagementPlugin/dsf/install-dsf.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Need to have a version number in order to install a specific DSF version...
+if [[ -z "$1" ]]; then
+	echo "Missing version"
+	exit 1
+fi
+VERSION=`echo $1 | sed 's/-/~/g'`
+
+# Determine the corresponding RRF package version. There may be multiple RRF packages per DSF version
+RRF_VERSION=`apt-cache show reprapfirmware | grep "Version:" | cut -d ' ' -f 2 | grep "$VERSION" | head -n 1`
+if [[ -z "$RRF_VERSION" ]]; then
+	echo "Could not find RepRapFirmware package for version $1. Invalid version or wrong package feed?"
+	exit 1
+fi
+
+# Install given version
+echo "Installing DSF $VERSION and RRF $RRF_VERSION"
+apt-get install -y --allow-downgrades -qq -o Dpkg::Options::="--force-confold" duetsoftwareframework=$VERSION duetcontrolserver=$VERSION duetwebserver=$VERSION duetpluginservice=$VERSION duettools=$VERSION duetruntime=$VERSION duetwebcontrol=$VERSION duetpimanagementplugin=$VERSION reprapfirmware=$RRF_VERSION < /dev/null
+echo "Done!"
+