Don't use tzlocal for start/stop of tasks

[mowgli]

Hi,

Please don't use this completely broken tzlocal library for starting and stopping the tasks. Instead, just start/stop it and task will decide the right timestamp itself.

Description:
I have a timezone (TZ=CET-1) that has no corresponding country/city zone (not in "daylitesaving" time. That is an absolute legal TZ definition.

The version 2.0.0b2-1 that is installed on debian unstable is absolutly broken as it gives python stack traces. With version 1.5.1-1 it works at least but when I start a task via taskwiki, the task is started 59 minutes in the future.

I read about the issue #110 but that gives no solution for me.