Fix some doc warnings and convert to myst#482

Merged

ascillitoe merged 10 commits intoSeldonIO:masterfrom ascillitoe:update_docs

Oct 14, 2021

+403-267

Commits on Sep 20, 2021

Commits on Sep 21, 2021

Add ipywidgets as dependency for examples
ascillitoe
committed

Commits on Sep 27, 2021

Updated doc/README.md and corrected display math
ascillitoe
committed

Commits on Oct 11, 2021