Use debian packages for graphite deploy

[arthurzenika]

The graphite packages are pretty recent https://packages.debian.org/search?keywords=graphite it would be nice to use them instead of deploying via pip.

This way we don't need to deploy supervisor, there is a supported init script.

[puneetk]

send over a pull request allowing users to pick whether they want pip or package install . we ll merge it up for everybody