WIP on 508 compliance -- 'Trip' Page
Tweak landmarks on 'Options' page, trip planning cycle
Remove 'Plan' button from breadcrumb landmark (508), re-indent trip modes
Change logo text for screen reader
Adjust navigation landmark on Trip Options page
Tweak landmarks for 'Review' page (508, WIP)
Adjust landmarks and 'alt' text for Trip Plan page (WIP)
Merge branch 'five0eight' into develop

Conflicts:
	app/views/trips/_location_input.html.haml
	app/views/trips/_new_or_edit_form.html.haml
	app/views/trips/_transit_details.html.haml
	app/views/trips/_walk_details.html.haml