Add nice README.md for Github

Author: cmb69

README.md

@@ -0,0 +1,27 @@
+Tablesorter_XH – a CMSimple_XH plugin
+======================================
+
+[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0)
+
+Copyright (c) 2012-2017 Christoph M. Becker
+
+Tablesorter_XH is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Tablesorter_XH is distributed in the hope that it will be useful,
+but *without any warranty*; without even the implied warranty of
+*merchantability* or *fitness for a particular purpose*.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Tablesorter_XH (see LICENSE).
+
+For further information see the user manual in help/help.htm.
+
+Christoph M. Becker  
+Rheinstraße 147  
+55424 Münster-Sarmsheim  
+GERMANY  
+<cmbecker69@gmx.de>

build.xml

@@ -74,6 +74,7 @@
                 <exclude name="coverage.xml"/>
                 <exclude name="pax_global_header"/>
                 <exclude name="phpcompatinfo.*"/>
+                <exclude name="README.md"/>
                 <exclude name="tests/**"/>
             </fileset>
         </move>