riemann: Really fix float-to-percent

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
riemann: Add a graphite server + parser

To plug some more stuff into the system, I will need a graphite-server,
and a parser that sets up an event properly.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>