Show drop down menus only when user is logged in, otherwise show permission level as a label
Edit to issue #446
Merge pull request #557 from concerto/dropdown_menu

Merging work towards issue #446.
Cache results of Concerto version check.  Closes #559.
Fix cache check. #559
Fix pagination with many children, close #537.
Merge branch 'master' of github.com:concerto/concerto
Use Rails caching middleware for version check per #559
Removed old icon sprites and sprites.scss.erb; created Concertocons icon font for logo button and other headers to close #259; introduced future content header icon to close #430
Merged master; added down triangle to Concerto logo button to make it clear that it is a selectable menu item