Add changelog entry for v0.5.0 (#81)

Minor release with a few new features and bug fixes.

Add a banner to the README (#61)

Uses the logo and a nice background image.

Add a changelog entry for v0.3.0 (#25)

Convert save_scene input to pathlib.Path (#21)

Forgot to convert the input path name so that strings could be used as
input.

Add changelog entry for v0.1.0 (#16)

Add an example to the README

Include a simple example and output plot so that the README is a bit
more exciting.