start guest can view posts
Allow guest to browse posts
User cannot create a post without a category
Create a category if none exist
Move resource above route in routes.rb
Change buttin to link in posts new
Remove extra newline
Merge pull request #12 from amZotti/lea-guest-can-browse-posts

Lea guest can browse posts
Make _post display email links
Display posts on user#show, make post partial link to history
Change navbar to reflect user history not just comments
A user can delete thier own posts and categories
Extracted a category update method
Extract an allowed_to_delete method

Enables making is_owner? method private