Merge pull request #27 from karlr-stripe/master

Set Content-Type to 'application/json' for ephemeral_keys endpoint

Author: joeydong-stripe

web.rb

@@ -32,6 +32,7 @@ def log_info(message)
     return log_info("Error creating ephemeral key: #{e.message}")
   end
 
+  content_type :json
   status 200
   key.to_json
 end