TheLib thesubversion

Removed unnecessary scope.

Moved thread_state_event_args to threading namespace.
Added worker_thread and corresponding worker_task.
Added test for worker_thread.

Missing thread_pool dtor implemented.

Revised thread pool implementation with std::thread-like submit method.

Added thread pool behaviour classes.
Added spin_lock class.

Added nested class vector_stream in image_factory.

Refactored network thread state reporting.

Fixed erroneous range check.

Fixed dispatcher startup issue.

Added simple_message_base::body_after().