0.4.0

[cgarciae]

• Big internal refactor:
  • Reduces the risk of potential zombie workers
  • New internal Worker and Supervisor classes which make code more readable / maintainable.
  • Code is now split into individual files for each API function to make contribution easier and improve maintainability.
• API Reference docs are now shown per function and a new Overview page was created per module.

Breaking Changes

• maxsize arguement is removed from all from_iterable functions as it was not used.
• worker_constructor parameter was removed from all from_iterable functions in favor of the simpler use_thread argument.