There are all sorts of odd or even non-conformant DICOMs out in the world.

When we encounter parser failures on a DICOM (for both the current and the in progress rewrite), it would be good to be able to toggle a debug mode flag that can help us better dig into parsing failures and provide helpful information. Ideally if this information is not PHI (e.g. just DICOM tags, other general info), it

Add a PolyDataIO based on the VTK::IOPDALmodule:

https://github.com/Kitware/VTK/tree/master/IO/PDAL

Steps (a complete example can be found here):

0. Verify that the test suite runs and passes

Currently, we are having readthedocs.org build the documentation for each PR and, if there are any warnings, the build fails immediately. This is a good thing, because it ensures that every PR is generating good documentation, including running the examples.

As discussed in #271, it would be nice to be able to see all of the warnings for the doc build instead of failing on the first one. B