StatusLogger Class

Used to print status messages to the standard output stream. Status messages are written every second and appear in the following format:

0 records processed (0 records per second)

A percent completion and an estimated time to completion (ETC) is appended to the status message if a "totalRecords" counter is given.
The status logger is run in a separate thread. The "recordCounter" is updated by the caller. Example:

    AtomicLong recordCounter = new AtomicLong(0);
    StatusLogger statusLogger = new StatusLogger(recordCounter);
    while (true){
       //Execute some process then update the counter
       recordCounter.incrementAndGet();
    }
    statusLogger.shutdown();