Update README

README.md

@@ -10,7 +10,7 @@ An event dispatcher for the [flux architecture](http://facebook.github.io/react/
 npm i --save barracks
 ````
 
-## API
+## Usage
 ````js
 /**
  * Initialize barracks.
@@ -24,17 +24,41 @@ var dispatcher = Dispatcher();
  */
 
 var callbackFunction = function(arg) {
-  console.log('I got triggered');
+  console.log(arg + ' got triggered');
 };
 dispatcher.register('eventName', callbackFunction);
 
 /**
  * Dispatch registered callbacks for 'eventName'.
  */
 
+dispatcher.dispatch('eventName', 'Loki');
+// -> 'Loki got triggered'
+````
+
+## API
+#### .register()
+Register a new object to the store. Takes a `{String} action` that determines the
+message it should respond to, and a `{Function} callback` that executes the response.
+````js
+dispatcher.register('eventName', function(arg) {return arg});
+dispatcher.register('otherEvent', function() {return 'hi')});
+````
+
+#### .dispatch()
+Trigger all callbacks corresponding to `{String} action` and provide them an
+argument of `{Mixed} data`.
+````js
+dispatcher.dispatch('eventName', 12);
+// -> 12
+
 dispatcher.dispatch('eventName');
-// -> 'I got triggered'
+// -> throw Error
+
+dispatcher.dispatch('otherEvent', null);
+// -> 'hi'
 ````
 
+
 ## License
 [MIT](https://tldrlegal.com/license/mit-license) © [Yoshua Wuyts](yoshuawuyts.com)