Semi-live editing support

[xleclercq]

A user needs to be able to make changes to a page and see the results in a web browser with minimal hassle.

This may work like this:

1. User saves the page he is editing/commits it into GitHub.
2. The change is detected by the running WebServer.
   3a) If the page was a view and was being edited then almost nothing needed since the page would be regenerated.
   3b) If the page is added (or removed) then we need to update the routes, which we don't support at all.

Also for total comfort running the server on local machine (or in a container on a local machine) would be the fastest. But this implies I distribute it and at the moment I was aiming to keep it as a remote service.