continuous updating of counters / queues

[dpwspoon]

The counters command should be able to stream out counters updates, perhaps at set intervals.

I.E.

watch -n java -jar command-log.jar -t counters -d /dev/shm

becomes something like

java -jar command-log.jar -t counters -i 5 (where i is the interval it updates at)

[dpwspoon]

It would be nice to do this for queues as well, and to be able to run both at the same time. I.E.

java -jar command-log.jar -t counters -t queues -i 5 (where i is the interval it updates at