Array of text choices in ORKTextChoiceAnswerFormat: need to be updated to be an array of ORKTextChoice's

[jwarmkessel]

Array of text choices in ORKTextChoiceAnswerFormat: must be updated to be an array of ORKTextChoice. This can be found in APHExerciseCheckinTask.m. And in StepAfterStep: where ORKChoiceQuestionResult* is found the value, not the localized string, should be used for comparison.