Create an SNS topic.

    CLI example to create a topic::

        salt myminion boto_sns.create mytopic region=us-east-1

def create(name, region=None, key=None, keyid=None, profile=None):
    '''
    Create an SNS topic.

    CLI example to create a topic::

        salt myminion boto_sns.create mytopic region=us-east-1
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
    conn.create_topic(name)
    log.info('Created SNS topic %s', name)
    _invalidate_cache()
    return True