Doxygen theme

[raynei86]

The documentation theme can really use some work, perhaps something like m.css?

[RobLoach]

Certainly open to changing the theme for doxygen, as long as it's easy to implement and requires minimal maintenance.

[raynei86]

I've made some changes in in my own fork. I couldn't really get m.css working, so I opted for doxygen awesome theme instead. I'll make a PR if satisfactory.

[RobLoach]

Thanks so much, looks like a great option.

[raynei86]

No problem! I'll make the PR now.