Add data.csv with list of authors in SPM of AR3 WGI

I copied the list of authors from the PDF in vim,
replaced commas with newlines, removed leading space
and empty lines, and copied the list to a new OpenOffice
Calc document. I then compared the name of each author
with the name displayed in the PDF, and found no error.
Merge branch 'master' into qa (add data for AR3 WGI SPM authors)
Add 59 missing authors to AR3 WGI SPM

Related issue:
https://github.com/medea-project/ipcc-database/issues/41