docs/conf.py: Add myself as a copyright holder on the docs.

Based on the following statistics:

$ git log docs |grep Author | sort | uniq -c | sort -n -r
    175 Author: Paul Sokolovsky
    135 Author: Damien George
     31 Author: Daniel Campora
     26 Author: danicampora
     14 Author: Peter Hinch

git blame stats script from http://stackoverflow.com/a/13687302/496009:

$ sh git-authors docs
   9977 author Damien George
   2679 author Paul Sokolovsky
   1699 author Daniel Campora
   1580 author danicampora
   1286 author Peter Hinch
    282 author Shuning Bian
    249 author Dave Hylands

Total lines per this script: 18417, my contribution is 14.5%.