Added models albums and media

Added ability to update information (cover, count, last_at) to model album

Added models albums and media

Added album pages (for current user and for all other users)

Added media demo seeds for admin user

Removed unused template. Added redirect from personal albums to common albums

On personal albums page added ability to create new album

Schema parameters for albums moved to external file. Changed response code for not authorized cases. Some methods renamed.

Added submenu on profile page. Added buttons on albums page.

Fixed mistake in code