example plotting code

[jsnel]

In order to visualize the output of the example case studies included in this repository some plotting helper code is needed. In order to avoid duplicating the plotting code with each example it should be either exist as an importable dependency or live at the top level of the repository and be easy importable into lower lying notebooks and scripts.

[jsnel]

Plotting code has migrated to pyglotaran_extra/plotting

In order to use it that package needs to be installed locally.