Fix bug and update to support responsive theme in subtheme

Header image form item is now sortable via manage fields
Header image form item has been moved to the vertical tabs menu

Username and password update now supported per #1295278: Update username and password.

Now with support IPv4/IPv6 address matching.

Improve PAPE support (require and verify phishing-resistant policy)

- Issue #1454426: Not working with Views 3.2+ by Murz, seddonym, and carolalindh. Fixing integration with views by overriding the built-in embed view and fixing the version information for views
- Fixing documentation and adding credits.
- Fixing exposed form as a block.
- Introducing the display_handlers embed_views_exposed form helper function.