remove sidebar

I like the navigation being up top for now
fixup styles and html for competitions/new

the competitions form still suffered from bootstrap naming and a lack of
styling.
update form on competition edit page

it might be a good idea to consolidate these forms but until I need to
use it again I'll hold off.
properly route 'past' and 'upcoming' competitions

I'm not sure why these were never routed properly, seeing as I already
wrote the scopes and setup the links