Listener format now whole number, not float
Listener format now whole number, not float

Munin would by default display listener figures with %7.2f format, which would sometimes mean you end up with 1.97 listeners for some unknown reason. We now ensure the value printed is a string, and tell munin to use a %7.0 format. Averages format still requires correction.

Some spelling and formatting / tab errors corrected.

mattyribbo/icecast2-munin