Made map edit visible to all users
Changed the edit map navbar from inverse colours
Changed styling of resource preview

The resource preview no longer has an image hogging valuable horizontal real estate.
The image has been moved to the resource heading, this makes it more symmetrical with the resource list
The whole resource preview is a link now
Swapped understanding slider and resource preview

ALso made resource preview pop out a little more
Changed map edit navabar to a simple well

This means that the edit navbar won't collapse on smaller screens.
Fixed image URL error
Merge branch 'master' into create-map
Merge pull request #94 from kennib/create-map

Create map