Add author record for homonym 'Michael Schulz'

I also inserted author+institution aliases for the two homonyms:

* SCHULZ, Michael - MARUM Center for Marine Environmental Sciences, Germany
  http://www.marum.de/en/Michael_Schulz.html

* SCHULZ, Michael - Norwegian Meteorological Institute, Norway
  http://met.no/Michael+Schulz.b7C_w7vYXe.ips

The latter contributed as lead author to AR4:
http://met.no/?module=Files;action=File.getFile;ID=3891

I kept the existing record for this author.