Changelog for pandoc-pyplot-2.3.0.1

Change log

Re-licensed package and library to GPL-2, same as pandoc. The previous license (MIT) was not compatible with pandoc's license.
Fixed an issue where plotly plots would not handle filenames correctly.

Added support for pandoc 2.8 and pandoc-types 1.20 (fixes #9). Because of breaking changes in pandoc-types 1.20, pandoc-pyplot 2.3.0.0+ only supports pandoc 2.8+.

Fixed an issue where setting the configuration option transparent: true left high-resolution figures difficult to see. Therefore, the option transparent: true does not affect high-resolution figures anymore.

Added support for two new configuration values: tight_bbox: true|false and transparent: true|false. These values are only supported via configuration files .pandoc-pyplot.yml.

Added examples and documentation on how to use pandoc-pyplot on LaTeX documents.
Allowed raw LaTeX macros in figure captions. This is required to label figures in LaTeX. E.g.:
```
\begin{minted}[caption=myCaption\label{myfig}]{pyplot}

\end{minted}
```
with-links key changed to links. I'm sorry. Pandoc doesn't support LaTeX tokens with -.

Switched to using optparse-applicative for command-line argument parsing.
Added a command-line options, "--write-example-config", which will write a config file ".pandoc-pyplot.yml" to show all available configuration options.
Links to source code and high-res images can be suppressed using {.pyplot with-links=false ...} (or via the configuration file with with-links: false). This is to get cleaner output in technical documentation (e.g. PDF). Example:
```
  ```{.pyplot caption="This is a caption" with-links=false}
  import matplotlib.pyplot as plt
  plt.figure()
  plt.plot([1,2,3,4,5],[1,2,3,4,5])
```
Added automated builds on macOS and Linux via Azure-Pipelines. Windows build will stay on Appveyor for now.

Added the "flags" configuration option, which allows to pass command-line flags to the Python interpreter. For example, warnings can be suppressed using the -Wignore flag.
Refactoring of the script check mechanism. It will be much easier to extend in the future.
Updated the command-line help with an example combining pandoc-pyplot and pandoc-crossref
Default Python interpreter is now "python" on Windows and "python3" otherwise.

Fixed a critical bug where pandoc-pyplot would interpret input from pandoc as a malformed command-line flag.

Added a command-line option to open the HTML manual in the default web browser.
Added documentation regarding compatibility with pandoc-crossref. This was always supported but not explicitly documented.

Fixed outdated documentation (referencing "target" parameter)
Fixed types required to build Configuration values that were not exported (SaveFormat, PythonScript)

Added support for config files ".pandoc-pyplot.yml", which specify different default values. This is mirrored in the new Configuration type and new functions, makePlotWithConfig and plotTransformWithConfig.
Added the ability to specify a different Python interpreter to use.
Added support for GIF and TIF files.
Added the "-f"/"--formats" command to show supported output figure formats.
Added support for GHC 8.2
Moved internal modules to Text.Pandoc.Filter.Pyplot.Internal module.

Many breaking changes in this release:

pandoc-pyplot will now determine the filename based on hashing the figure content. Therefore, figures will only be re-generated if necessary.
Removed the ability to control the filename and format directly using the plot_target=... attribute.
Added the ability to control the directory in which figures will be saved using the directory=... attribute.
Added the possibility to control the figures dots-per-inch (i.e. pixel density) with the dpi=... attribute.
Added the ability to control the figure format with the format=... attribute. Possible values are currently "png", "svg", "pdf", "jpg"/"jpeg" and "eps".
The confusing plot_alt=... attribute has been renamed to caption=... for obvious reasons.
The plot_include=... attribute has been renamed to include=....
Added the generation of a higher resolution figure for every figure pandoc-pyplot understands.

Added the ability to include Python files before code using the plot_include=script.py attribute.
Added a test suite.

Added support for captions using the plot_alt=... attribute. For example:

  ```{plot_target=test.png plot_alt="This is a caption"}
  import matplotlib.pyplot as plt
  plt.figure()
  plt.plot([1,2,3,4,5],[1,2,3,4,5])

Added plotTransform :: Pandoc -> IO Pandoc function to transform entire documents. This makes it easier to integrate pandoc-pyplot into Hakyll-based sites!

Updated README with fixes and warnings
Added top-level package documentation compatible with Haddock
Added Unsafe language extension, as this filter will run arbitrary Python scripts.

Initial release.

See documentation on Hackage