Added a README.md file for Github

git-svn-id: http://opensource.mlba-team.de/svn/xdispatch/trunk@512 9e4c620c-c391-4b63-a7fb-4924991ea895

README.md

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+xdispatch (trunk)
+=================
+
+XDispatch provides the power of Grand Central Dispatch not only on Mac OS 10.6+
+but also on Windows and Linux. The XDispatch framework consists of three libraries:
+ * libdispatch
+ * libxdispatch
+ * libqtdispatch
+
+This repository contains a mirror of the trunk and the stable branch of the
+XDispatch subversion repository located at http://opensource.mlba-team.de/svn/xdispatch.
+
+Feel free to fork it and change it as you like. We always welcome any bugfixes or
+improvements to our current code base.
+
+
+Usage
+-----
+
+Please see the documentation at http://opensource.mlba-team.de/xdispatch for details.