Add capybara, poltergeist, & database_cleaner gems
Setup capybara & database_cleaner in test_helper
Test that root shows list index
Test that List index shows all lists
Add postgres gem
Use Postgres
Test list creation
Use list name in link on List index view
Test List show view
Test appearance of list items
Use partial to render Lists
Use partial to render Items
Test List editing
Test back lin on List show
Test List destroy
Replace assert_selector with specific matchers
Remove uneeded line of code
Redirect user to list upon new item creation
Enable creation of items in views