[TASK][DOC] (seitosh): add short description

This is a legacy commit from before 2015-03-01.
It may be incomplete as well as inconsistent.
See COPYING.legacy and README.history for details.

This way the project receives a title page

README.md

 Seitosh
 =======
 A Seismologist's Tool Shed
+
+Seitosh is a collection of source code for program libraries 
+and programs in seismic data processing, seismic data simulation 
+and inversion. They are kept bundled in one repository due to 
+their strong interrelation. For further information see the
+accompanying [wiki](../../wikis/home).
+
+Copyright and License
+---------------------
+See [COPYING](COPYING) for copyright and license and disclaimer
+of warranty. You are invited to fork this project and to provide
+your own additions by sending patches or pull requests.
+The home of the original Seitosh repository is https://git.scc.kit.edu/Seitosh/Seitosh
+
+Installation
+------------
+See [INSTALL.md](INSTALL.md) for installation instructions.
+The contents of this repository previously were hosted 
+in the [TFSoftware](http://gpitrsvn.gpi.uni-karlsruhe.de:8000/TFSoftware)
+repository. Not all of the accompanying documentation and
+installations instructions have yet been copied from there.
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