Create Micropost model and migration, and add first tests and relation with User model
Add/update annotations to models and corresponding tests
Add functionality for displaying microposts in right order, validating them and making sure they're destroyed with their user; Create a Micropost factory
Add templates for showing microposts, and corresponding tests
Add sample microposts and put them style
Add microposts resource and controller, add corresponding tests; move filter to sessions_helper
Add micropost creation functionality (action, views, helpers) and corresponding integration test
Add a proto-feed for users' home page when signed-in, and corresponding tests
Add functionality for deleting microposts and corresponding tests. Finish chapter 10.