code: public RequestToken save(BaasHandler<BaasDocument> handler) {
          return save(SaveMode.IGNORE_VERSION,null, RequestOptions.DEFAULT, handler);
      }
docs: Asynchronously saves this document on the server ignoring its version.
  @param handler a callback to be invoked with the result of the request
  @return a {@link com.baasbox.android.RequestToken} to handle the request.