code: def changeset_info(changeset):
      
      keys = [tag.attrib.get('k') for tag in changeset.getchildren()]
      keys += ['id', 'user', 'uid', 'bbox', 'created_at']
      values = [tag.attrib.get('v') for tag in changeset.getchildren()]
      values += [
          changeset.get('id'), changeset.get('user'), changeset.get('uid'),
          get_bounds(changeset), changeset.get('created_at')
          ]
  
      return dict(zip(keys, values))
docs: Return a dictionary with id, user, user_id, bounds, date of creation
      and all the tags of the changeset.
  
      Args:
          changeset: the XML string of the changeset.