create sites controller, url controller, index view page for sites
get domain method for url
rm public/index.html
added site id column to urls, check domain method to url model
consolidate method into check_domain, now sets a url's link
get data method using nokogiri, set tags param to tag_list, save url
site index view page, shows sites and url
stylized urls
site name and url links now link to respective show pages