Update doc, improve settings
This docs folder shouldn't be here
Remove updates_cursor from models

The updates_cursor  is used by magpie and not used by moogle.
Small fronted fix

Increased the top padding of the main content to show a larger empty space between the navbar and the content.
Add tour link to navbar

Now it is possible to reach the tour from anywhere in the site. In the tour there is a link back to the search page for logged users.