Updated RSpec from 2.x to 3.0.0, added dependencies and fixed all the deprecation warnings in tests
Cleaning up the code of the items
Delete todo list items functionality and tests
Extract todo list helper
Added RSpec helpers: Rails Dom ID Helper and todo list helpers file
Created a header in the layout, changed some html markups, and added some of CSS to the app
fixed some missmatches of the CSS selector in the tests
Added functionality: Mark todo list item as complete.
Clean up todo mark completion view
Added tests and functionality for making todo list items comlete
Cleaning views of todo lists, and todo list items, added the necessary into the view for make completing items funcional, added some of styling