Plantuml-markdown

Other

* Chore: add source tarball with requirements.txt at the root, for publishing to https://pypi.org/project/plantuml-markdown/#files. [Nick Boldt]

* Update README.md. [Mark Moretto]

Aiming to clear-up some of the installation instructions.

* Update plantuml_markdown.py. [Mark Moretto]

Updated `https://pythonhosted.org/..` URLs within file to `https://python-markdown.github.io/...`

Fix

* Fixed corrupted inline svg images (fixes 90) [Michele Tessaro]

Changes

* Updated the changelog. [Michele Tessaro]

Fix

* Fixed handle of other diagram types with plantuml server. [Michele Tessaro]

When using a PlantUML server the handling of non-uml diagrams
(`startmindmap`, `startjson`, etc.) was building wrong open/close tags.

* Fixed urllib3 warning in output page (fixes 89) [Michele Tessaro]

`urllib3` gives a warning when an insecure connection is used, and the
warning is included in the output page.
Now the warning is disabled if an insecure connection to a PlantUML
server is used.

New

* Added support for other plantuml diagrams. [Michele Tessaro]

Now can be used other kind of diagrams, like `startgantt`,
`startmindmap`, `startjson` and many others.

* Added option for overriding plantuml command (resolves 87) [Michele Tessaro]

* Added plantuml config option (implements 88) [Michele Tessaro]

Fix

* Set default value for unsecure setting as boolean (fixes 86) [Michele Tessaro]

Changes

* Updated CHANGELOG for the new release. [Michele Tessaro]

Fix

* Explicitly pass charset to plantuml. [Victor Westerhuis]

The code is explicitly encoded to UTF-8, but plantuml gets to pick its own charset. On my Windows installation it picks codepage 1252 by default, leading to wrong characters in the output. UTF-8 should be available everywhere according to the [PlantUML documentation](https://plantuml.com/unicode).