add pytest coverage
Add repoze.debug#pdbpm to development wsgi pipeline to drop into debugger on errors.
Ensure experiments are not their own controls (leads to infinite recursion)
Make validation images open in new window.
Fix image links
Skip / log validations for incorrect product_id. Log duplicate non frowny_gel validations.
loadxl tweaks.
Merge remote-tracking branch 'origin/master' into cssCleanup