Add a munin plugin to monitor query latency.
Add a munin plugin to monitor query latency.

paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,lekkas/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep