Fine-grain Logging

This branch adds fine-grained logging to mpdj:

-  Options have been added to log to syslog and console.
-  Level of logging is output specific and uses syslog levels.
-  New dependency on Log::Dispatch.
-  The --verbose option has been removed (use --conlog debug as replacement).
-  If no logging options are given then mpdj will be silent (matches previous behavior).