Update plenpy to version 0.3.0. -) Switch from Numpy style docstring to Google style -) Adding of the ``utilities.colors`` module with spectrum to RGB conversion -) Introducing per-color-channel view in ``LightField``'s ``show_interactive()``, in particular useful for hyperspectal light fields -) Introducing 2.5D epipolar images -) Many corrections in overall codebase, in particular documentation wise -) Excluded ``show`` functions from coverage report