Doxygen

[JiaT75]

Pull request checklist

Please check if your PR fulfills the following requirements:

• [X] Tests for the changes have been added (for bug fixes / features)
• [X] Docs have been reviewed and added / updated if needed (for bug fixes / features)
• [X] Build was run locally and without warnings or errors
• [X] All previous and new tests pass

Pull request type

Please check the type of change your PR introduces: - [ ] Bugfix - [ ] Feature - [ ] Code style update (formatting, renaming, typo fix) - [ ] Refactoring (no functional changes, no api changes) - [ ] Build related changes - [X] Documentation content changes - [ ] Other (please describe): ## What is the current behavior?

Doxygen was outdated and never used

Related Issue URL:

What is the new behavior?

• Doxygen will now only generate liblzma API functions documentation
• No longer generate LaTex documentation
• Update Doxygen from 1.4.7 to 1.8.17

Does this introduce a breaking change?

• [ ] Yes
• [X] No

Other information

[JiaT75]

We will still need to have a few updates for the documentation before it is ready to be published on the website, but I am still working through them. It better to break these PRs up to make it a bit more manageable. I figured this was a good start.