Add zoom package

packages/zoom.xml

+<!-- vim: set softtabstop=3: -->
+<!-- Autogenerated by /usr/local/bin/wpkg-msi running on wpkg-xml-test as user alt36 -->
+<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>
+