(#29) Added a tasks module, implemented a task to run the mail queue processor, sending any automatically generated emails in the queue.
Tasks can be run manually, with the virtual env active:
python ow/tasks/run.py development.ini TASK_NAME
(where TASK_NAME is the name of a task, like send_emails)
Running the run.py script without parameters gives an usage-like message with instructions on how to properly call the script.