README.markdown in c2dm-0.2.2 vs README.markdown in c2dm-0.3.0

@@ -1,66 +1,61 @@
 # c2dm
 
-c2dm sends push notifications to Android devices via google [c2dm](http://code.google.com/android/c2dm/index.html).
+c2dm sends push notifications to Android devices via c2dm sends push notifications to Android devices via [Google Cloud Messaging (GCM)](http://code.google.com/android/c2dm/index.html).
 
 ##Installation
 
     $ gem install c2dm
     
 ##Requirements
 
-An Android device running 2.2 or newer, its registration token, and a google account registered for c2dm.
+An Android device running 2.2 or newer, its registration token, and a [GCM api key](https://code.google.com/apis/console).
 
 ##Usage
 
-*Important*: Version 0.2.0+ decouples auth from sending so the API changed. Please update your code.
-
 There are two ways to use c2dm.
 
-Sending many notifications:
+Sending many individual notifications using a static method:
 
 	notifications = [
 	  {
-	    :registration_id => "...", 
-	    :data => {
-	      :some_message => "Some payload"
-	      :another_message => 10
+	    registration_id: "...1", 
+	    data: {
+	      some_message: "Some payload",
+	      a_value: 10
 	    },
-	    :collapse_key => "foobar" #optional
+	    collapse_key: "foobar" #optional
+    },
+	  {
+	    registration_id: "...2", 
+	    data: {
+	      some_message: "Some other payload",
+	      a_value: 20
+	    }
 	  }
 	]
 	
-	C2DM.authenticate!("[e-mail]", "somepassword", "YourCo-App-1.0.0")
+	C2DM.api_key = "YourGCMApiKey" # This initializes all future instances of C2DM with "YourGCMApiKey"
 	C2DM.send_notifications(notifications)
 
-...or one at a time:
+Sending this way will not raise an error but `send_notifications` will return an array of 
+hashes including the `registration_id` and the `response`. If GCM returns an error while C2DM
+is sending one of the notifications, the `response` in the hash of the appropriate notification 
+will be an object of type `C2DM::GCMError`.
 
-	C2DM.authenticate!("[e-mail]", "somepassword", "YourCo-App-1.0.0")
-	c2dm = C2DM.new
+...or one at a time by creating an instance:
 
-	notification = {
-	  :registration_id => "...", 
-	  :data => {
-	    :some_message => "Some payload",
-	    :another_message => 10
-	  },
-	  :collapse_key => "foobar" #optional
-	}
+	c2dm = C2DM.new("YourGCMApiKey")
+	data = {some_message: "Some payload", a_value: 10}
+	collapse_key = "optional_collapse_key"
+	c2dm.send_notification("aRegistrationId", data, collapse_key)
 
-	c2dm.send_notification(notification)
+Sending using an instance of C2DM will raise a `C2DM::GCMError` error when sending fails.
 
-Note that calling *authenticate!* will authenticate all new instances of C2DM. You can override this by passing in your own auth_token:
-
-	c2dm = C2DM.new(auth_token)
-
 ##Copyrights
 
-* Copyright (c) 2010-2012 Amro Mousa, Shawn Veader. See LICENSE.txt for details.
+* Copyright (c) 2010-2012 Amro Mousa. See LICENSE.txt for details.
 
 ##Thanks
-
+* [Shawn Veader](https://github.com/veader)
 * [Paul Chun](https://github.com/sixofhearts)
-* [gowalla](https://github.com/gowalla)
-
-##Other stuff
-
-You might want to checkout GroupMe's fork of this gem as well.
+* [gowalla](https://github.com/gowalla)
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