- marking now works (for 20% and maxValue, NOT for "Verbrauch"!)
- changing Provider now causes redraw with markings!
- localgraph now has different data and marks! (was playground)
- setting begin and end when zooming makes no sense, when sliding edges
have to be set to, not appropiate! (and problem with date-format
(GMT+100 und GMT+200 (native format of dygraph)