Describe a DynamoDB table.

    CLI example::

        salt myminion boto_dynamodb.describe table_name region=us-east-1

def describe(table_name, region=None, key=None, keyid=None, profile=None):
    '''
    Describe a DynamoDB table.

    CLI example::

        salt myminion boto_dynamodb.describe table_name region=us-east-1
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
    table = Table(table_name, connection=conn)
    return table.describe()