added new methods
added new methods

Added 'base64Encode' to handle the encoding for restws auth.
Added 'getDrupalDdpToken' to get auth token from Drupal.
Added 'updateNodeInDrupal' to handle sending data back to drupal.

shrop/drupal-ddp,bfodeke/drupal-ddp,meteorclub/drupal-ddp,hb5co/drupal-ddp