increase wait timeout up to 15 seconds
 * support nsq 0.2.22 protocol (nanosec timestamp)
 * configurable messagesPerBatch and lookupPeriod in NSQClient
 * replace println with log.info
Merge pull request #6 from kulikov/master

Support nsq 0.2.22 protocol (nanosec timestamp). Configurable messagesPerBatch and lookupPeriod in NSQClient