Merge pull request #11 from art-spilgames/master

Updated mysql-statsd with a working version
Update contributing
Introducing preprocessors
Fixing PEP8 issues
Introducing --foreground/-f option to run without forking
Refactoring some stuff
Update README.rst
Update README.rst
Merge pull request #12 from thijsdezoete/dev/preprocessors

Looks good, thanks
Added raw values to be passed on to Statsd