Openpmd-viewer

This version improves the layout of the Jupyter GUI and allows the user to
select a particular region of the plots through this GUI.

In addition, support for massless particle (e.g. photons) was added. In this
case, the momenta are returned in kg.m.s^-1, instead of using the
dimensionless momenta.

This is version `0.5.4` of openPMD-viewer.

It adds support for Python 3.4 (which erroneously dropped in the past).

This is version `0.5.3` of openPMD-viewer.

It corrects some of the issues with the size of boxes and widgets in the
interactive slider. In addition, the iteration number is now read from
the hdf5 metadata, and not the name of the file.

This is version `0.5.2` of openPMD-viewer.

It fixes some of the installation issues associated with Cython.

This is version `0.5.1` of openPMD-viewer.

It corrects a minor bug in the dependencies of the package.

This is version `0.5.0` of openPMD-viewer.

This new version includes the `ParticleTracker` object, which allows user to track individual particles across different iterations, provided that their `id` is stored in the openPMD file. Also, starting with this version, openPMD-viewer now depends on `Cython`.

For more information on how to use the `ParticleTracker`, see the tutorial notebook.