Plottoolbox

Feat

- **docstrings**: moved to new dostring template format in latest tstoolbox

Fix

- more changes to separate the plot type keywords
- **time**: fixed aspects of hlines and vlines
- **plot_styles**: updated and added new plot styles from SciencePlots styles

Fix

- **setup.py**: needed to include package data

Fix

- included the necessary files in MANIFEST.in

Refactor

- plottoolbox -> src/plottoolbox, docsrc -> docs