Rollin' forward

1.1

• Fix group membership check
• Add separated listing for active groups
• Rename SVIE member types to: 'Rendes tag', 'Külső tag', 'Öreg tag'
• Fix contradiction between SVIE application and primary group select
• Update registration page, add explanation for screen_name
• Fix screen name validation, disallow slashes
• Fix new post type creation, post types belong to groups, won't be globals
• Add group name to user's post editing page
• Add validation for post types, restrict empty name
• Fix broken cropped photo path

This is it!