Log-shuttle's logs.

[ryandotsmith]

Currently, log-shuttle prints stats each second of operation on STDOUT.

reads=90 drops=0 lines=0 batches=0
reads=45 drops=0 lines=0 batches=0

In addition to keeping counts on current operations, we will want to inject drops into the stream going to logplex. E.g. If we are dropping customer logs we should tell them via their logs.

[ryandotsmith]

Also, the reporting is chatty. Perhaps we can not report if all of the values are 0.

[ryandotsmith]

Verbosity level.