Add JSON formatter (close #79)

Author: worldofchris

README.md

@@ -25,7 +25,7 @@ Cucumber.js is still a work in progress. Here is its current status.
 | [Failing steps](https://github.com/cucumber/cucumber-tck/blob/master/failing_steps.feature)                                   | Done                |
 | [Hooks](https://github.com/cucumber/cucumber-tck/blob/master/hooks.feature)                                                   | Done                |
 | [I18n](https://github.com/cucumber/cucumber-tck/blob/master/i18n.feature)                                                     | To do               |
-| [JSON formatter](https://github.com/cucumber/cucumber-tck/blob/master/json_formatter.feature)                                 | To do               |
+| [JSON formatter](https://github.com/cucumber/cucumber-tck/blob/master/json_formatter.feature)                                 | WIP<sup>4</sup> |
 | [Pretty formatter](https://github.com/cucumber/cucumber-tck/blob/master/pretty_formatter.feature)                             | WIP<sup>2</sup>   |
 | [Scenario outlines and examples](https://github.com/cucumber/cucumber-tck/blob/master/scenario_outlines_and_examples.feature) | To do               |
 | [Stats collector](https://github.com/cucumber/cucumber-tck/blob/master/stats_collector.feature)                               | To do               |
@@ -38,6 +38,12 @@ Cucumber.js is still a work in progress. Here is its current status.
 1. Not certified by [Cucumber TCK](https://github.com/cucumber/cucumber-tck) yet.
 2. Considered for removal from [Cucumber TCK](https://github.com/cucumber/cucumber-tck).
 3. Simple *Around*, *Before* and *After* hooks are available.
+4. Missing 'matches' attributes. Simple wrapper for Gherkin JsonFormatter pending porting of:
+
+* https://github.com/cucumber/gherkin/blob/master/lib/gherkin/listener/formatter_listener.rb
+* https://github.com/cucumber/gherkin/blob/master/lib/gherkin/formatter/filter_formatter.rb
+
+In Gherkin itself
 
 ### Cucumber.js-specific features
 

features/cli.feature

@@ -10,7 +10,7 @@ Feature: Command line interface
         Scenario:
           When a step is passing
       """
-    Given a file named "features/step_definitions/cucumber_steps.js" with:
+    And a file named "features/step_definitions/cucumber_steps.js" with:
       """
       var cucumberSteps = function() {
         this.When(/^a step is passing$/, function(callback) { callback(); });
@@ -51,7 +51,7 @@ Feature: Command line interface
         Scenario:
           When a step is passing
       """
-    Given a file named "step_definitions/cucumber_steps.js" with:
+    And a file named "step_definitions/cucumber_steps.js" with:
       """
       var cucumberSteps = function() {
         this.When(/^a step is passing$/, function(callback) { callback(); });
@@ -75,7 +75,7 @@ Feature: Command line interface
         Scenario:
           When a step is passing
       """
-    Given a file named "step_definitions/cucumber_steps.js" with:
+    And a file named "step_definitions/cucumber_steps.js" with:
       """
       var cucumberSteps = function() {
         this.When(/^a step is passing$/, function(callback) { callback(); });