Update wp_nav_menu

Updated order to match codex, and added 'fallback_cb' => false to prevent nasty PHP errors when a menu has not been defined
Remove "and the Sparks Framework" and rel="" to satisfy WordPress and W3C
Update link to go to Theme URI instead of Author URI
Change version to release candidate 2
Update credit link to focus on Flint, not Star Verte LLC
Fix font override for headings
Removed Schema and in future will integrate via Steel, removed remove_admin_bar
Fix .navbar-brand for really long titles
Drop obsolete hgroup
Merge pull request #69 from mbeall/master

Various changes