Enhancement: Trigger project status notifications based on scancode-config.yml values

See related issue about the scancode-config.yml file: #1197

If a project is created and executed with a scancode-config.yml file, and if that file contains a notification_address, send a notification (email or similar) to that address containing:

* the text of the "run log" normally made available via SCIO UI status field (e.g. "Success")
* all of the links normally made available via SCIO UI buttons associated with "Download results as:" so that the recipient can access those links to obtain those result files.