Customizable featured worlds support
Better support for case in which there exists no featured worlds
Streamlined code, re-enabled loading on interval, better world sorting
Re-enabled admin pages, minor regression fix
Reorganized routes code for increased conciseness and added initial admin pages
Added admin page to accepted routes array
Support for "children" template pages
Initial design of admin worlds page
Merge remote-tracking branch 'origin/landing_page' into node_threejs