More website content and fixes.
- Per Dmitriy, change the clone URL to github even though we'll continue using Kitware for MRs.
- Add the remaining content from the old sensei-insitu.org site.
- Per Seb, do not include full paths in
tpl/__sidebar__
so that highlighting of the current page works. - Change
doc/config.js
so that gh-pages is rooted at/
instead of/sensei
so that our custom domain works properly. Without this, the CSS file (at a minimum) is put in the wrong place. - Update the version of kw-doc we require to catch fixes from Seb.
- Other small fixes.