datetime with timezone offset breaks insert

[philroberts]

"Incorrect datetime value: '2015-01-25 22:14:35+00:00' for column 'startTime' at row 1"

Used to work on 1.2.3. Looks like it was introduced with the change from strftime to isoformat here.

[methane]

I've fixed this on mysqlclient and release 1.3.5. Only source distribution is available for now.