Support fluent API to register resource and function.

[zackyang000]

Example:

odata
.all()
  .auth(function(){...})
.delete()
  .before(function(){...})
.resource
  .create()
  .url('/book')
  .model(model)
  .all()
    .auth(function(){...})
  .get()
    .after(function(){...})
  .delete()
    .before(function(){...})
  .post()
    .action('50-off')
      .handle(function(){...})
  .options()
    .orderby('date desc')

[xuubin]

+1

[zackyang000]

#22, Methods can return this to help with method chaining.

[zackyang000]

done v0.7