Tried to fix false impluses around midnight

See http://manfred.wilzeck.de/stolpersteine.html#Weitere_Stolpersteine

The Minute might switch to "00" without the hour beeing changed. E.g.
23:59:59 -> 23:00:00 -> 00:00:00
This might have been the problem, if the day was changed before the hour
too. We'll see...
Added .gitignore