Fix the routes.

Added some basic routes, this will need some explanation.
Also, added a seed.rb file, to get quick demo data working.
Add debugger to Gemfile.

This allowed us to see what was happening with the
  error we were getting on the EntriesController#edit page.
Change the way we use data in the ListsController.

Using a helper_method that sets a variable.
I.e., entries is a method that sets the @entries
  variable.  It helps us talk to the database only
  one time / request.
This is a style change that helps keep the mind clear
  when working.
Add helper-method version of the ListsController.

Want to use helper methods instead of bare
  instance variables.  This was to teach
  the principle of how to keep your thinking
  clean with controllers, and how the controller
  and view depend on each other.
Merge branch 'master' of github.com:RaquelRobertson/shopper

Conflicts:
  app/views/lists/show.html.erb
  config/routes.rb