[Feature request] Lifecycle hooks

[sdhull]

Primarily I want to keep a count of models created (during a session). I'm thinking something like Activerecord lifecycle callbacks would be awesome.

var count = 0;
var Bike = $cachedResource("bikes", "/bikes", {id: "@id"}, null, {
  beforeCreate: function(bike) {
    count += 1;
  }
});