Test against Ruby 2.1.2 as well
Tighten up the rspec/sinatra dependencies for development
Explicitly require active_support dependency for development
Update README.md

I updated the URL of the blog post by Anthony Eden
Merge pull request #30 from Spone/patch-1

Update README.md
Fix link to Cucumber

Cucumber project is now hosted at https://github.com/cucumber/cucumber
Merge pull request #31 from Spone/patch-1

Fix link to Cucumber
Remove rvmrc.
Set ruby version and gemset with .ruby-version and .ruby-gemset.
Don't implement json steps if there is JsonSpec class