Add markdown README, build badges

README.md

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+[![Travis-CI build (Linux, OS X)](https://travis-ci.org/heimdal/heimdal.svg?branch=master)](https://travis-ci.org/heimdal/heimdal#)
+[![Appveyor-CI build (Windows)](https://ci.appveyor.com/api/projects/status/6j0k0m7kd6jjj4tw/branch/master?svg=true)](https://ci.appveyor.com/project/heimdal/heimdal/branch/master)
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+Heimdal
+=======
+
+Heimdal is a Kerberos 5 implementation.
+
+For information how to install see [here](http://www.h5l.org/compile.html).
+
+There are man pages for most of the commands.
+
+Bug reports and bugs are appreciated.  Use GitHub issues or send e-mail to [heimdal-bugs@h5l.org](mailto:heimdal-bugs@h5l.org).
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+For more information see the project homepage [https://www.h5l.org/](https://www.h5l.org/) or the mailing lists:
+
+ - [heimdal-announce@sics.se](mailto:heimdal-announce@sics.se)	low-volume announcement
+ - [heimdal-discuss@sics.se](mailto:heimdal-discuss@sics.se)	high-volume discussion
+
+Send e-mail to [heimdal-announce-request@sics.se](heimdal-announce-request@sics.se) and [heimdal-discuss-request@sics.se](heimdal-discuss-request@sics.se) respectively to subscribe.
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+Build Status
+============
+
+[![Travis-CI build (Linux, OS X)](https://travis-ci.org/heimdal/heimdal.svg?branch=master)](https://travis-ci.org/heimdal/heimdal#)
+[![Appveyor-CI build (Windows)](https://ci.appveyor.com/api/projects/status/6j0k0m7kd6jjj4tw/branch/master?svg=true)](https://ci.appveyor.com/project/heimdal/heimdal/branch/master)