trying to regularize page URL structure

As described here: http://jekyllrb.com/docs/github-pages/#project-page-url-structure
regularizing page structure with jekyll variable

As described here: http://jekyllrb.com/docs/github-pages/#project-page-url-structure
adding base url variable to internal menu links
trying to insert date in default layout
trying to get date to display
removing date_to_string
keep date format used on old site
adding html lessons, wgot from original site
first bulk pandoc conversion attempt
replacing tabs with spaces
decompose comment tags
change pre block attributes so pandoc will recognize them
pesky tabs
reverting first bulk conversion
moving processing scripts out of html folder
adjusting paths for new script placement
account for pre blocks that don't have a class
second bulk conversion attempt
Revert "second bulk conversion attempt" to fix codeblocks

This reverts commit 8962c417ebadc7921781392688beeaa639cad6de.
removing unneeded pre attributes