README: Added markdown readmine with gitlab CI badge

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

README.md

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+[![pipeline status](https://gitlab.com/libssh/libssh-mirror/badges/master/pipeline.svg)](https://gitlab.com/libssh/libssh-mirror/commits/master)
+
+```
+  _   _   _                          _
+ (_) (_) (_)                        (_)
+ (_)  _  (_) _         _  _   _  _  (_) _
+ (_) (_) (_)(_) _     (_)(_) (_)(_) (_)(_) _
+ (_) (_) (_)   (_)  _ (_)  _ (_)    (_)   (_)
+ (_) (_) (_)(_)(_) (_)(_) (_)(_)    (_)   (_).org
+
+ The SSH library
+
+```
+
+# Why?
+
+Why not ? :) I've began to work on my own implementation of the ssh protocol
+because i didn't like the currently public ones.
+Not any allowed you to import and use the functions as a powerful library,
+and so i worked on a library-based SSH implementation which was non-existing
+in the free and open source software world.
+
+
+# How/Who?
+
+If you downloaded this file, you must know what it is : a library for
+accessing ssh client services through C libraries calls in a simple manner.
+Everybody can use this software under the terms of the LGPL - see the COPYING
+file
+
+If you ask yourself how to compile libssh, please read INSTALL before anything.
+
+# Where ?
+
+https://www.libssh.org
+
+# Contributing
+
+Please read the file 'SubmittingPatches' next to this README file. It explains
+our copyright policy and how you should send patches for upstream inclusion.
+
+Have fun and happy libssh hacking!
+
+The libssh Team