wrote 3 failing feature tests for editing a post
added a link to the edit form on the post show page
wrote two failing controller test for post#edit
implemented posts#edit
implemented posts#update
added link to post#index in navbar
added a link to user profile in navbar
added links to user profile from posts#index and posts#show
added linkes to all of a user's posts from user profile page
Merge pull request #7 from LightningLord/edit_post

Edit post