[TASK][DOC] (seitosh): refer to README.history

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.

Refer to a file which is not yet present.
It will be added during surgery.

README.md

@@ -21,4 +21,6 @@ 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.
\ No newline at end of file
+installations instructions have yet been copied from there.
+See [README.history](README.history) for the history of 
+this project.
\ No newline at end of file