created instance variables in rough.rb using erb to display them on localhost
added instance variable @title to the layout.erb file, and changed titles for different pages in the main.rb file
installed four gems in anticipation of needing them: sass, slim, sqlite, data_mapper, and dm-sqlite-adapter
converted all erb files to .slim files; added require 'slim' in the main.rb file;
deleted nav (navigation) links from the layout and added them to a separate file called nav.slim; then accessed the nav file from layout using == slim :nav
starting to write scss, haven't yet, just created a route handler for it >> get '/styles.css' { scss: styles }; thats it.