Unify user names in the license header authors list.
Remove duplicate users in the authors list.
Cleanupo of some other inor issues.

Decision to not use doxygen for licence headers. Removes doxygen formatting and file tag.

Pulls some author and date information from previous headers, adds this to information from the svn and git repositories.
Inlude the standard copyright header to approximately 2000 files with institute of original committer as copyright holder.
Contributing authors from previous declaration and repository records.

This version is an exact copy of the last revision of the trunk branch
of the old SVN repository of CbmRoor at
https://subversion.gsi.de/cbmsoft/cbmroot/trunk
The old SVN repository will still be available for read access.