Check for references to TFSoftware with 'git grep -n TFSoftware' in the root
of Seitosh. Replace those references by proper references to Seitosh. Discard
SVN keywords, where I come accross them.

Refernces to TFSoftware remain untouched at locations where the history of the
repository is addressed explicitly or where progress within TFSoftware is
addressed in comments and tickets are referred to.

This work is finished.

The amount of obsolete SVN keywords remaining in the files is too large, to
discard them at once.