Add statistics display to "/criteria"
Add statistics display to "/criteria"

  Add display of some statistics to the /criteria page.
  This makes it easy to get some basic statistics.

  At this time it reports:
  Current number of criteria: 66 (active) + 8 (future) = 74 (total)
  Among active criteria, there are 42 MUST, 10 SHOULD,
  and 14 SUGGESTED criteria.
  Among active criteria, 21 allow N/A, 8 require a URL when met,
  and 37 have details in their description.

Signed-off-by: David A. Wheeler <9ae72d22d8b894b865a7a496af4fab6320e6abb2@dwheeler.com>

taylorcoursey/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,jdossett/cii-best-practices-badge,wanganyv/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,dwvisser/cii-best-practices-badge,jdossett/cii-best-practices-badge,coreinfrastructure/best-practices-badge,coreinfrastructure/best-practices-badge,wanganyv/cii-best-practices-badge,taylorcoursey/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,coreinfrastructure/best-practices-badge,coreinfrastructure/best-practices-badge,wanganyv/cii-best-practices-badge,yannickmoy/cii-best-practices-badge,dwvisser/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,linuxfoundation/cii-best-practices-badge,taylorcoursey/cii-best-practices-badge,dwvisser/cii-best-practices-badge,jdossett/cii-best-practices-badge,dwvisser/cii-best-practices-badge,wanganyv/cii-best-practices-badge,taylorcoursey/cii-best-practices-badge,jdossett/cii-best-practices-badge