Added category F.2.1.

Added category F.2.1: Analysis of Algorithms and Problem Complexity, Numerical Algorithms and Problems

From BBOB 2013 example papers @

http://coco.gforge.inria.fr/doku.php?id=bbob-2013
e.g.
http://coco.gforge.inria.fr/lib/exe/fetch.php?media=example2012cmpnoisefree.pdf