Sugestion: `navbar-center`

Created by: fbritoferreira

It seems that there is alot of people wanting to have their navbars centered on the page, may be good to include a css class such as navbar-center that will center all the element in the navbar.

text-center on the navbar div doesn't work as it meant to only center text and not all elements.

Reference: http://stackoverflow.com/questions/21980660/bootstrap-3-align-navigation-to-center http://stackoverflow.com/questions/18777235/center-content-in-responsive-bootstrap-navbar