Merge branch 'rsat-gpmtools' into 'master'

Rsat gpmtools (Group Policy management tools capability)

See merge request !138

packages/rsat-gpmtools.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<packages:packages xmlns:packages="http://www.wpkg.org/packages">
+  <package id="rsat-gpmtools" name="RSAT: Group Policy Management Tools" revision="%version%.%packageversion%" priority="0" reboot="false">
+    <variable name="version" value="0.0.1.0" />
+    <variable name="packageversion" value="1" />
+
+    <variable name="capname" value="Rsat.GroupPolicy.Management.Tools~~~~%version%" />
+    <variable name="regkey" value="HKLM\software\ucam_wpkg.cam.ac.uk\rsat-gpmt" />
+
+    <check type='registry' condition='equals' path='%regkey%\version' value="%version%"/>
+
+    <install cmd='dism /online /quiet /add-capability /capabilityname:"%capname%"' />
+    <install cmd='reg add %regkey% /t reg_sz /v version /d %version% /f'/>
+
+    <upgrade include="remove" />
+    <upgrade include="install" />
+
+    <!-- Warning: will trigger a reboot if the management console is open. But because
+         the running process is actually mmc.exe we can't safely taskkill it, alas -->
+    <remove cmd='dism /online /quiet /remove-capability /capabilityname:"%capname%"' />
+    <remove cmd='reg delete %regkey% /f' />
+
+  </package>
+</packages:packages>