* Internal refactoring to make it slightly easier to "override" user `realname` values that get returned from the API.
2.8.0
* Add support for visibility.
When you look up a single photo with `get_single_photo()`, it now returns information about the photo's visibility (is it public, private, friends/family only).
2.7.0
* Add support for raw tags.
When you look up a single photo with `get_single_photo()`, it now returns the raw tag values and other tag information in the `raw_tags` field.
2.6.2
* Fix the name of the Stockholm Transport Museum when looked up using this library.
2.6.1
* Don't throw an `AssertionError` when looking up photos with a tag which is the empty string.
2.6.0
* Add a custom exception for private photos
If you try to look up a private photo with `get_single_photo()`, it throws a new `PhotoIsPrivate` exception rather than a `UnrecognisedFlickrApiException`.