• Added support for barrier synchronization (via new sync method).
  Added barrier_sync.pl example.
  
• Addressed rounding errors with the sequence generator.
  The sequence option now follows a bank-teller queuing model when
  generating numbers. This applies to task 0 only. Other tasks can
  still specify sequence where numbers will be distributed equally
  among workers like before.
  
• Optimized the _worker_request_chunk private method.
  
• A take 2 on the matrix multiplication examples. This is better
  organized with updated README file to include the script running
  time in the results.