Add right-aligned login info and logout button, currently broken.

See SO question at http://stackoverflow.com/questions/20789868/bootstrap-3-navbar-right-no-padding-with-navbar-fixed-top/20790401
Fix problem

When navbar-fixed-top is used, we must have a container.
The css added to the application stylesheet makes it span the full width
possible.
In boostrap 3.1.0 (?) they will add support for .container-fluid, which
is what we really want.
Merge branch 'right-align-login' into visual-tweaks