Add a micropost model
Add basic tests to micropost model
Add a relation user has_many microposts
Annotate models
Add a micropost factory
Add a test to ensure microposts is listed in the right order (newer first)
Adapt user 'has_many' relation with micropost to delete them when a user is removed
Add validation on micropost content
Add a microposts listing in user profile
Adapt the populate rake task to create an set of microposts
Add routes for microposting
Add access controll for microposts actions
Move signed_in_user method to sessions_helper
Add the microposts controller
Fix a typo
Fix another typo
Add microposts controller create action
Add microposts creation to the homepage for signed in users
Add a micropost instance to the home action
Update partial 'user/_fields' to take account of recent changes