Update to work with ctapipe 0.8.0, including coding style improvement:
- application of autopep8
- pyflakes
- pylint Note: Still carrying a local PixelStatusContainer(), as no timing information seems to be included in that one in ctapipe 0.8.0. Consider to move to same implementation as for PedestalContainer() and ask for ctapipe pull request. Did not do a tag so far (propose 0.3.0), as would wait for after some additional testing