Restore Copyright & License link

The copyright and license is an important part of OpenStreetMap.
This restores the copyright & license link to the menu, placing
it in the top-right with the other pages which do not display a map.

Fixes #548

Fixes comments in https://github.com/openstreetmap/openstreetmap-website/pull/498#issuecomment-26741518
Change "Copyright & License" to "Copyright" and move it left