Added Microposts, associations, ordering, and testing to ensure destroy
Added Micropost model validations
Added sample microposts and micropost styling
Add micropost routes
Set up micropost controller and access control
Reverted commits from chapter 9 in order to get tests to pass correctly
Updated error messages for signup and editing users
Added status feeds and tests
Added delete links and destroy actions for microposts
Exercises 10.1 to 10.5. Added test for micropost sidebar, pagination for user feeds,  test that delete link is not available for other user microposts, refactored home page to use partials, and extracted duplicate delete micropost into partial.
Exercise 10.6. Added wrapping for text that is too long
Exercise 10.7. Added a Javascript display to countdown characters