Compare time ranges
-------------------
:Sample Code:
    .. code:: python

        from datetimerange import DateTimeRange
        lhs = DateTimeRange("2015-03-22T10:00:00+0900", "2015-03-22T10:10:00+0900")
        rhs = DateTimeRange("2015-03-22T10:00:00+0900", "2015-03-22T10:10:00+0900")
        print("lhs == rhs: ", lhs == rhs)
        print("lhs != rhs: ", lhs != rhs)

:Output:
    ::

        lhs == rhs:  True
        lhs != rhs:  False