Changelog for pandoc-plot-0.4.0.1

Change log

Fixed an issue where the pandoc-plot executable could not be built outside of its git repository.

Updated documentation.
Added a --full-version flag to the executable, which includes which version of pandoc/pandoc-types was used, as well as the git revision.
Added the clean command to the executable. This can be used to clean-up output files produced by pandoc-plot.
Changed the flag --write-example-config to the command write-example-config.
Added the top-level function cleanOutputDir to clean output of pandoc-plot. This is only accessible if pandoc-plot is used as a library.
Added a distinction between failure to render a figure because of a mistake, and failing to render a figure because the toolkit is not installed. pandoc-plot will give better error messages in the latter case.

Added more examples.
Added MacOS binaries built via Azure pipelines.
BREAKING CHANGE: Parsing captions based on source file was not working. Captions format can be specified in the configuration file. This unfortunately changes the type signature of a few high-level functions.

Added support for gnuplot.
Added more tests for all toolkits.
Fixed an issue where the package could not be installed because a source file was not included in the cabal file.