CBD-924:  perl script to JSON query buildbot and emit some HTML

Change-Id: I29b65da4b5271d6c8972043786e522ad2980091a
CBD-924:  perl functions moved into perl module

Change-Id: Ie8d46806d38f5978b7b66e60f4a8c7c1fd0de24b
CBD-924:  turned into true CGI, which required params 'builder' and 'branch'

Change-Id: If25e5a5d58f2f85db35f4bdcc0490a0aa244d214