addmicroposts model and view
Made first incornation of feed
Made deletion of miroposts
ex 10.5.2 add tests for microposts pagination in root page. Set per_page: 10 to all models
ex 10.5.3 refactored home page
ex 10.5.4 write test to make sure delete links do not appear for microposts not created by the current user
ex 10.5.5 extract partial delete_micropost to eliminate duplication
ex 10.5.6 fix very layout broken by very long words with wrap helper