created dynamic category selection based on tags
Merge branch 'master' of https://github.com/catherine-jones/my-blog
removed the ability for anyone to sign up for my blog
removed has many as it was causing an error and has been replaced with gem
removed migration file add categories to posts as app now using taggable gem
possible fix for heroku issue
Merge branch 'master' of github.com:catherine-jones/my-blog into refactoring

Conflicts:
	app/controllers/posts_controller.rb
	app/views/layouts/_header.html.erb
	app/views/pages/about.html.erb
	app/views/posts/index.html.erb
	app/views/posts/show.html.erb