#58 added cancan and authorization for blog posts
#58 added rolify to improve testability of authorization
#58 fixed cucumber tests
#58 tidied a few comments
Merge branch 'master' into dev-58-restrict-editing
#58 added rails_12factor gem
#58 downgraded rolify version
#58 added comment to Gemfile explaining why Rolify downgrade was necessary
Merge pull request #60 from jbrunton/dev-58-restrict-editing

Close #58: Restrict editing to admins