changed name of nav_bar to block use of site in production
changed css for cover image
added css to make homepage background image transparent
changed path of images on homepage
changed config.serve_static_assets to true and precompiled assets
changed html and css to display image on homepage
cleaned up css; redesigned homepage; added screenshot; fixed bug in search count
precompiled assets for heroku
changed configs in production.rb to get Heroku to display images properly
removed testing border on homepage; changed navbar-adjustment to remove background line between navbar and header image in production