Release 0.11.9

Removed

• Deprecated context manager on Streamer. Instead, use the object directly.
• Deprecated function mpservice.util.is_exception.

Changed

• Streamer.peek parameter interval: default changed to 1 from 1000.
• Class Streamer is renamed Stream; the old class Stream was removed.

Added or enhanced

• mpservice.streamer.Parmapper.__init__ takes two new arguments executor_initializer and executor_init_args.
• Simplifications to the implementation of streamer.py, making use of GeneratorExit and removing class Stream.
• New utility functions mpservice.util.get_shared_thread_pool, mpservice.util.get_shared_process_pool.