adding QgsVectorLayer with sublayers will add the sublayers automaticall (instead of the first vector layer only)
modified doc\source\screenshot2.py
added keyword "name:str=None" to .createMapView(...)
TimeSeries.tsd(date:numpy.datetime64, None) returns the 1st TimeSeriesDatum with respective data (instead of None)

Signed-off-by: benjamin.jakimow <benjamin.jakimow@geo.hu-berlin.de>