Added the navigation bar used in the main site
CSS updates
Added script to allow themes to be imported via command line
Do not allow import_themes.php to be called except by command line
Merge remote-tracking branch 'origin/feature/import_themes_2' into feature/navigation_bar
Updated the navigation bar to reflect changes in the main site nav bar
Added login and register links
Define paths relative to script path
Removed guest header panel and fixed header login link
Show "logout" to logged-in users and removed redundant logout link from the welcome box
Merge pull request #3 from Starbow/feature/navigation_bar

Added the navigation bar used in the main site