Fixing copyright issues and code contributors

Fixing copyright issues and code contributors

Added Mark Abraham, Christoph Junghans and
Carsten Kutzner to the list of code contributors,
per discussion with Erik and Berk.

* Now that 2013 is a copyrightable year, we need to
  assert that copyright
* No, we can't just say 1995-2013, unless we also say
  that every year in the range is a copyrightable year. I'm
  not interested in demonstrating after the fact that this is
  true for all the years before I was born. So we may as
  well start listing explicit years.
  Please read "howto (L)GPL" guides before arguing :-)
* Removed erroneous GROMACS copyright statements on
  unmodified FindBLAS.cmake,FindLAPACK.cmake,
  FindOpenMP.cmake and slightly modified FindGit.cmake
* Note Szilard's uncertainty about the origin of
  vectype_ops.cuh and thus its copyright status
* TODO for 4.6.1 deal with material in admin and scripts

References #818

Change-Id: I946200651de7f05c2ff292fcded8f33fca7b356f