Get the historic states for a name, grouped by block height.

def get_name_history( self, name, offset=None, count=None, reverse=False):
        """
        Get the historic states for a name, grouped by block height.
        """
        cur = self.db.cursor()
        name_hist = namedb_get_history( cur, name, offset=offset, count=count, reverse=reverse )
        return name_hist