Made the DJ utility function return the Dummy DJ entry instead.
Renamed track search form/view to be more accurate.

This commit also makes the view properly use select_related
when returning results.
Added a default DJ and User account.

This ensures we can always give out some kind of DJ object when
asked for.
Moved templates to a more namespaced templates/radio/ directory
Moved the CSS to a LESS approach.

Bootstrap is included here as source.