* Fix <table> output of 'to html',
Specifically, add <thead> and <tbody> elements.
That allows for better styling and (future) some neat JavaScript.
* Update tests for previous <table> changes.
* MathEval Variance and Stddev
* Fix tests and linting
* Typo
* Deal with streams when they are not tables
* First draft of these commands
* To MD
* To md and to html
* Fixed cargo and to_md
* `into_abbreviated_string` instead of `into_string`
* Changed how inner tables are displayed