Make tag index page building work

* Update blah
  Add page and tag index-sources to .gitignore

* Update blah.otl

* Update Makefile
  * Add build target for tag index page
  * Clean up old comments
  * Fix problem that hasn't shown up before...

* Update blessedPages.tmpl
  "Blessed pages" will now be shown in sorted order, not reverse
  chronological order

* Update head.tmpl
  * Clean up old comments
  * Add link to tag index page