Fixes for backbone 1.0 compatibility

[scttnlsn]

Why did you remove the model argument from the error and success callbacks?

[sithmel]

Backbone.js documentation shows that method "save" takes an optional callback "success" with model, response, options as arguments. http://backbonejs.org/#Model-save But this callback is not the same called by Backbone.sync. It is wrapped inside another success callback. In the original source code you can see this:

save : function(attrs, options) {
   ...
  var success = options.success; // this is the original "success" callback 
  options.success = function(resp, status, xhr) { // this is the callback called by sync
    if (!model.set(model.parse(resp, xhr), options)) return false;
    if (success) success(model, resp, xhr);
  };
  options.error = wrapError(options.error, model, options);
  var method = this.isNew() ? 'create' : 'update';
  return (this.sync || Backbone.sync).call(this, method, this, options);
},

Watching better Backbone.js history It seems to me that this was an old backbone.io issue and my fix is not even complete. The correct functions signature should be:

success(resp); // status and xhr doesn't make sense in our case

and

error(resp); // see Backbone.wrapError 

[sithmel]

I'll make a better commented, more complete pull request in few days, ok?

[scttnlsn]

Awesome...thank you!