Merge branch 'nextcloud' into 'master'

Initial ucam package for Nextcloud v2.6.4

See merge request !94

packages/nextcloud.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<packages:packages xmlns:packages="http://www.wpkg.org/packages">
+
+  <package id="nextcloud" name="Nextcloud client" revision="%version%.1" priority="16" reboot="false" execute="once">
+    <variable name="version" value="2.6.4" />
+    <check type="uninstall" condition="versiongreaterorequal" path="Nextcloud" value="%version%" />
+
+    <install cmd='"%WPKGSOFTWARE%\nextcloud\nextcloud-%version%-setup.exe" /S' />
+
+    <upgrade include='install' />
+
+    <remove cmd='%WPKGSOFTWARE%\wpkg\tools\waitforprocess.cmd Un_A.exe' />
+    <remove cmd='"%PROGRAMFILES%\Nextcloud\Uninstall.exe" /S' />
+    <remove cmd='%WPKGSOFTWARE%\wpkg\tools\waitforprocess.cmd Un_A.exe' />
+  </package>
+
+</packages:packages>