Update copyright year (in program) and version string
Move strip_session_url() into a more accessible function within the Publishing.Gallery3 namespace
Make intro message wrap properly
Make the API key field longer than an API key so the user sees all of it in one glance
Set Login and Publish push buttons to have focus of the toplevel widget
Add new 'path' property to the Album class

This property is just the last part of the URL.  Most of the time that's what's needed, but sometimes the whole URL is necessary.
Remove unused 'media_type' variable from GalleryPublisher
Eliminate some internal differences between publishing to a new album and to an existing album

This tries to store paths wherever possible; it merges PublishingParameters.{_album_url,_parent_url} into _album_path.
Minor tweaks to the code aesthetics...