decorator for q style promises

$q.js

  app.config(['$provide', function($provide) {
    $provide.decorator('$q', function ($delegate) {
      var defer = $delegate.defer;
      console.info('Q');
      var all = $delegate.all;
      $delegate.defer = function () {
        var deferred = defer();
        deferred.promise.success = function (fn) {
          deferred.promise.then(function (value) {
            fn(value);
          });
          return deferred.promise;
        };
        deferred.promise.done = deferred.promise.success;
        deferred.promise.error = function (fn) {
          deferred.promise.then(null, function (value) {
            fn(value);
          });
          return deferred.promise;
        };
        deferred.promise.fail = deferred.promise.error;
        deferred.promise.spread = function(fn) {
          deferred.promise.then(function(promises) {
            fn.apply(fn, promises);
          });
          return deferred.promise;
        };
        return deferred;
      };

      $delegate.all = function(allPromises) {
        var dfd = $delegate.defer();
        all(allPromises).then(dfd.resolve, dfd.reject);
        return dfd.promise;
      };

      return $delegate;
    });
  }]);