Adds Predator Alert questions as a new category 'predator'

See http://maybemaimed.com/playground/predator-alert-tool-for-okcupid/ for details on Predator Alert.

"The Predator Alert Tool for OkCupid (PAT-OKC) is an add-on to your Web browser that alerts of you of any red flags for a given profile as you browse OkCupid. "

That add-on is heavyweight, not particularly robust, and fails to run on some systems. It also visits profiles of other users without permission, in what appears to be some kind of data-gathering initiative. In addition, it takes profile pictures and does facial recognition(!) against the US sex offenders registry(!!). Entirely apart from usability issues, I have deep concerns about the data-gathering and the risk of false positives with that facial recognition system.

To the best of my knowledge, I am not reproducing any of the Predator Alert developer's original work; these questions are either sourced from a study by Lisak and Miller, or pre-existing OkCupid questions.