Fix food truck show link on vendors page
Sort vendors by name
Hide unnecessary columns on vendors index
Allow timeslots to be sorted within the vendor show page
Allow time slots to be sorted on the location page
Fix typo on locations page
Merge branch 'master' of heroku.com:lv-food-trucks

Conflicts:
	app/admin/locations.rb
	app/admin/vendors.rb
Cleanup nested resource helper logic