Imagezmq

- Tested **imageZMQ** with newer versions of Python (through 3.11).
- Modified tests to use Picamera2 and latest Raspberry Pi OS.
- Improved documentation content, layout, arrangement.

Improvements

- Added `__enter__` and `__exit__` methods so that `ImageHub` and
`ImageSender` will work in a `with` statement.
- Added history and keywords to setup.py.

Changes and Bugfixes

- Multiple fixes to documentation files.

Improvements

- Added `tests/unit_tests` directory to hold "tests of new imageZMQ features".
Also added README_Unit_Tests.rst in that directory to explain Unit Tests for
imageZMQ improvements going forward.
- Added `close()` method in `ImageSender` and `ImageHub` classes. Added 2 test
programs to `tests/unit_tests` to test it. Added `close()` to API docs.
- Added Advanced PUB/SUB example with multithreaded fast subscribers for
realtime processing. (philipp-schmidt).
- Added this `HISTORY.md` file to document version change history.
- Fixed inconsistent spellings of `imageZMQ`.

Changes and Bugfixes

- Multiple fixes to documentation files.
- Fixed documentation of API, adding `connect()` method to ImageHub class docs.

Improvements

- Added setup.py, MANIFEST.in and PyPI_README.rst to enable pip installation and upload to PyPI.
- Added new images /docs/image/various_badges.svg with static badge images to improve README.rst load time.
- Reference as 1st Release in GitHub, PyPI (2020-02-05) and Zendodo (2020-02-12).

Changes and Bugfixes

- Changed README.rst to show badges referenced in badge_fetch.rst.
- Changed README.rst to include pip install instructions.
- Multiple fixes to all documentation files.

Improvements

- Implementation of PUB/SUB ZMQ messaging pattern (bigdaddymax).
- Example of PUB/SUB ZMQ messaging pattern (bigdaddymax).
- Example of HTTP Steaming Example (bigdaddymax).
- Helpful fork: Add timeouts to `ImageSender` to fix restarts or non-response of `ImageHub` timeouts (youngsoul).

Changes and Bugfixes

- Multiple fixes to all documentation files.
- Substantial rewrite of API, to include and clean up PUB/SUB option docs.

Improvements

- More detail and uniform formatting for docstrings and code snippets in docs.
- Additional tests and test docs.

Changes and Bugfixes

- Multiple fixes to all documentation files.
- Restructured test files & testing documentation to make them consistent.