Click blocks are now active - sort of.

- The respond to clcks.  One click on the
  title displays the content. Another hides it.

- Need to hand load some code.  See the tesets,
  in particular that for `click_min.adoc`.  See
  test.sh for directions on how to use.

- test $ ru env -hm and -t pass

- added some files that should have been in repo eg.ent_to_uni.rb