Author list command test added.
#496 Created IsArchived flag in Medias table; added medias filtering by this flag;
#496 API: added ability to filter by IsArchived; test modifications;
#496 Media Manager: Created UI, controller actions and commands for archive / unarchive media items.
Merge branch 'dev' of github.com:devbridge/BetterCMS into dev
#478: initial version of restructured service layer (blog authors).
Merge branch 'dev' into dev-webapi