ignore swp
myplot: get started on new data format and styles

- not tested yet!
- fix _using and _with_errs by using self.error_sums
ccsgp: deprecate styles argument
update to new data format works
catch wrong data format
move shape check to _plot_errs
utils: extend zip_flat to three
myplot: rm maxCols, implement sys. errors
setAxisRange: take errors into account
add/rm comments
config: update default_colors
myplot: add _clamp and _colorscale
myplot: rm logging, raise Exceptions
myplot: finish syserrs
implement horizontal lines