Display a set dropdown on the new photo page.
Pass set to member.flickr_photos - broken\!
Typo fix.
Stop controller tests from connecting to Flickr

... by stubbing out Member#flickr_sets in a photo_controller test. I
looked at the flickrmocks gem, but it doesn't seem very helpful - it
still requires you to connect to Flickr.
Fix problem adding photos from photosets.

When we fetched photos from a photoset, the response object didn't
respond to to_a, breaking our controller code. This turned out to be due
to weirdness in FlickRaw's API:
https://github.com/hanklords/flickraw/issues/58
New photo: show an h2 with the name of the current set

Also don't show a sets dropdown if the user has no sets.
show the name of the selected set
cleaned up member.flickr_photos based on flickraw author's advice
Merge pull request #255 from Skud/photo_set

Photo set