switch to rdiscount for markdown processing
add zurb foundation stylesheets

Also add any unaltered files in an archive folder.
This is Foundation 5.0.2 so that's the archive folder
add zurb theme for use by jekyllbootstrap
switch to zurb foundation framework

This required more tweaking and fixes than is obvious
from this commit.  The grid is different and is now
properly responsive, but there was much editing of
the helper scripts that deal with image galleries
until I got it working.

Going through the above took most of the weekend,
mainly as I wanted to be sure I still needed all
the parts of my bespoke style.css file.
add strikethrough

Since I've moved to rdiscount for markdown I can
now have proper strikethrough in my writing. Yay!
wrap video iframes with flex-video

The div.flex-video class comes with zurb foundation
and makes it easy to have autoscaling embeded content
make embeds widescreen
update template
update template - again
add BASE_PATH to image link
add images for zurb post
add post on zurb migration
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