Gumnut-assembler

Documentation

* Change scope of this file ([73a2f1e](https://www.github.com/bwiessneth/gumnut-assembler/commit/73a2f1effd85ee345ad3ca8f43a3a6610f10add1))
* Fix configuration for latest sphinx-rtd-theme version ([af07eec](https://www.github.com/bwiessneth/gumnut-assembler/commit/af07eecbbd5bc3b68dfa9252e5fa2ab3f274724a))
* Update version ([be25a65](https://www.github.com/bwiessneth/gumnut-assembler/commit/be25a65697393b671f8525e0b6adc039a3d5560c))
* Update year ([61ca55d](https://www.github.com/bwiessneth/gumnut-assembler/commit/61ca55df871e16926b50265e29aa518b38b09531))

⚠ BREAKING CHANGES

* Changed CLI entry point name from ``gumnut_assembler`` to ``gumnut-assembler``

⚠ BREAKING CHANGES

* Enforced proper module names and naming convention

Bug Fixes

* Typos in README
* Making sure ``tox`` is using the package, not the source files for testing
* Updated development docs

Miscellaneous Chores

* The README file is now also using reStructuredText format


Bug Fixes

* ``equ`` directive is now working for ascii values (e.g. ``char_a: equ 'a'``)

Miscellaneous Chores

* Proper CLI for standalone usage
* Documentation (still in progress, though)
* Introduced ``tox`` for handling testing, build, and publishing tasks
* Introduced Github Actions for automated testing

Code Refactoring

* Replaced ``nosetest`` with ``pytest`` as the choice for unit and integration testing
* Updated the existing tests for ``pytest``


Bug Fixes

* Module imports were fixed