Add /logout
Make menu a helper and add admin links

Makes it possible to use $self->session et.c. for determining menu
contents, and making it dynamic.
Bugfix: Get requested collection, not always id 1...
Bugfix: Only get public collections in Public.pm
Add quote_char and name_sep to Schema connect
Add helper get_user_collections
Add /user/albums and /user/album/:id
Rework logic for /photo/:filename (WIP)
Add name of collection as h2 in template
Add admin pages for managing users
Add admin pages for managing collections
Add managing of collections/users
Add adding and removing of photos to albums
Change default join type for cover photo

Makes collections show up even if they have no specified cover photo.
Show first photo of collection if no cover found
Change default photo size when viewing collection
Release v0.2