Merge pull request #69 from stevekinney/update-contributing-for-cli

Update contributions section for CLI

source/contributing/adding-new-features.md

@@ -44,7 +44,7 @@ problems with early return.
 ```js
 if (Ember.FEATURES.isEnabled("feature")) {
   // implementation
-} 
+}
 ```
 
 Tests will always run with all features on, so make sure that any tests
@@ -64,7 +64,7 @@ described above.
 
 #### Feature Naming Conventions
 
-```js
+```config/environment.js
 Ember.FEATURES["<packageName>-<feature>"] // if package specific
 Ember.FEATURES["container-factory-injections"]
 Ember.FEATURES["htmlbars"]
@@ -77,8 +77,16 @@ guarded by the conditionals in the original source. This means that
 users of the canary build can enable whatever features they want by
 enabling them before creating their Ember.Application.
 
-```js
-Ember.FEATURES["htmlbars"] = true;
+```config/environment.js
+module.exports = function(environment) {
+  var ENV = {
+    EmberENV: {
+      FEATURES: {
+        htmlbars: true
+      }
+    },
+  }
+}
 ```
 
 ### `features.json`