Ikiwiki tweaks and updates

While Ikiwiki http://ikiwiki.info can be used for CGI-based blogging, that's now how we're using it here. This is by design. When used as an off-line site compilation process, it produces results that have zero host dependencies. It's fast and stable and can be hosted anywhere.

This site uses Ikistrap from https://github.com/gsliepen/ikistrap. This helps integrate Bootstrap 4 http://getbootstrap.com/ with Ikiwiki.

It also uses a patched smileys plugin so that ASCII emoticons are converted to Unicode emojis. See https://ikiwiki.info/todo/smileys_should_support_Unicode_Emojis/