(Group) add ability to set appearance attribute to field-list

Does this: https://confluence.dimagi.com/display/commcarepublic/Common+Logic+and+Calculations#CommonLogicandCalculations-DisplayingQuestionsinListForm(forAndroidonly)

Change of spec required me to create a new field list question type.
![screen shot 2013-07-05 at 2 27 08 pm](https://f.cloud.github.com/assets/716573/755129/5280f008-e5a1-11e2-9449-34a933c30a01.png)