Revert "Add administration to manage Users, Blogs, Authorizations, and Tags. Cleanup specs and views."

This reverts commit a6603cb9438216cfa80d097db76e18c1a2a3c283.
Revert "Revert "Add administration to manage Users, Blogs, Authorizations, and Tags. Cleanup specs and views.""

This reverts commit 526efa724fa6ea6dfd6e359964f828f121c29efe.