adding HasQuestionnaire field to model
boolean expressions already return booleans
boy scouting - these predicates (and my new one) needed to be tested
moving predicate testing to its own top level context, adding not-in-response tests, some cleaning up'
updating with changes on master
version bump to 5.2.0
merging master in
Merge pull request #74 from cbdr/has-questionnaire

Has questionnaire?!