Pulls resque queue sizes and sends them off to statsd.

Usage: resque_queues.rb [options]
    -r RESQUE_SERVER:PORT:DB,        Redis server and port database for resque
        --redis
    -s, --server SENDCHANNEL_HOST    Statsd host
    -p, --port SENDCHANNEL_PORT      Statsd port
    -e, --prefix PREFIX            Statsd Prefix