Make sure we always put a valid URL on the edit tab, and allow switching
-rw-r--r-- 888 README
-rw-r--r-- 307 Rakefile
drwxr-xr-x - app
drwxr-xr-x - config
drwxr-xr-x - db
drwxr-xr-x - doc
drwxr-xr-x - lib
drwxr-xr-x - public
drwxr-xr-x - script
drwxr-xr-x - test