Additional contributors to datamash.

  Copyright (C) 2013-2020 Assaf Gordon <assafgordon@gmail.com>

  Copying and distribution of this file, with or without modification,
  are permitted in any medium without royalty provided the copyright
  notice and this notice are preserved.

Thanks to:

    Aaron Quinlan ( http://quinlanlab.org/ ) whose 'groupBy' program
    (https://github.com/arq5x/bedtools) was the inspiration for datamash.

See also the AUTHORS and ChangeLog files.
