Merge branch 'zoom' into 'master'

Add new Zoom.xml package

See merge request !135

packages/zoom.xml

+<!-- vim: set softtabstop=3: -->
+<packages:packages xmlns:packages="http://www.wpkg.org/packages">
+  <package id="zoom" name="Zoom" revision="%version%.1" reboot="false">
+    <!-- Zoom have an odd approach to version numbers. This version does not seem to match
+         anything in the GUI, so check the MSI -->
+    <variable name="version" value="5.1.28656" />
+
+    <check type="uninstall" condition="versiongreaterorequal" path="Zoom" value="5.1.28656" />
+
+    <!-- get the MSI from https://www.zoom.us/client/latest/ZoomInstallerFull.msi
+         MSI documentation at https://support.zoom.us/hc/en-us/articles/201362163-Mass-Installation-and-Configuration-for-Windows -->
+    <install cmd='msiexec /qn /l* %WPKGLOGDIR%\zoom.log /i %WPKGSOFTWARE%\zoom\%version%\ZoomInstallerFull.msi'>
+      <exit code="3010" reboot="false" />
+    </install>
+
+    <upgrade include="install" />
+
+    <remove cmd="msiexec /qn /x {A139FFD5-0C05-4777-A23A-CF7093D62630}">
+      <exit code="1605" />
+    </remove>
+  </package>
+</packages:packages>