Create new Tag-object from dict.

            Suitable for creating objects from XML-RPC data.
            All available keys must exist.

def from_dict(cls, tag=None):
        """ Create new Tag-object from dict.

            Suitable for creating objects from XML-RPC data.
            All available keys must exist.
        """

        if tag is None:
            tag = {}

        l = Tag()
        l.name = tag['name']
        return l