#41 Add link in mail notification to the point added from a new request

This fix issue #36.

Sorry for delay, and thanks for contribution :-).

I don't merge as-is because you should use the Django reverse function to build the URL. Less fragile and simpler than crafting the URL by hand. You may need to use the request.build_absolute function, to help you getting the full URL, including hostname.

Good luck, happy to help if needed :-)

Ok, I look this as soon as possible.

Superseded by #49