Update docs pages.

* Copy code documentation to docs pages
* Add a few undocumented options
* Configure `<code>` tag to display better

@Dylnuge @bigsley
It doesn't really fall under the purview of this PR, but we might want to rename `isSortable` to something like `isReorderable` in the future. As it's currently named I'd guess the flag affects whether or not the entire table can be sorted ascending/descending on the given column instead of whether or not the column can be rearranged.