The signature of all the methods callable from JavaScript had to change
from:
-- (void)register:(NSMutableArray *)arguments
withDict:(NSMutableDictionary *)options;
to
+- (void)register:(CDVInvokedUrlCommand*)command;

The old format was officially obsoleted in in Cordova 3.0, so there is
no way around using the old one.

'arguments' and 'options' needed to use the new 'command' object.

With this new format the plugin result interface was also broken, so it
was changed to the new documented format.

This code is _not_ well tested at this point, but I wanted to get it up
for anyone having issues migrating to 3.0.

Fix for setApplicationIconBadgeNumber

Updated to Cordova 2.7, fixed a number of bugs. Cleaned up some code.

* Put all the plugin code in the plugin namespace: com.plugin.gcm;
* Renamed to namespace GCM to gcm, namespaces should be lower case
according to the java style guidelines;
* Deleted the google gcm code and added gcm.jar instead;
* Added CordovaGCMBroadcastReceiver.java to enable GCMIntentService to
be namespaced in the plugin namespace instead of the client project
(which is is the default with google's GCMIntentService);
* Moved all java <--> javascript interop to PushPlugin;
* Moved all notification code to GCMIntentService (maybe this fits
better in its own class);
* Changed the way the plugin detects cold starts in order for it not to
crash when the back button is used to navigate out of the app;
* Changed the caching on the filesystem to a memory cache on a static
variable, which increases performance and simplifies code;
* Cut up some code into separate methods ;
* Added code comments;
* Updated the readme file.

cordova-plugman support

Update README.md

You need to add android.permission.GET_TASKS. 
Without this permission, the application crashes when it receives PUSH NOTIFICATION.