Chef application added to project using Erlang
New category with one application added

It was to hard to decide if load testing should be in testing or profiling, hence new category.

Tsung itself has two pages. [First](http://www.process-one.net/en/tsung/), to which github repo points, is not updated to often. [Second](http://tsung.erlang-projects.org/index.en.html), which seems to be up to date, does not look too impressive.  So I decided to go with link to github repo.
One more load tester
Merge pull request #27 from mpmiszczyk/load-testing

Load testing