I should be able to specify that a Date Property is just a Month or Year

(User Story, Closed -> Will Not Fix, Priority: Critical, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Summary: There are a number of use cases that really just want Years. The underlying control for the Date UI supports this, so expose it appropriately.
Make sure that the wikify() for Date can handle this as well.
This is basically a meta-Property you can apply on a Date Property, which sets the Min View Mode on the control.
Actually, the bootstrap-datepicker does not handle year-only well. In particular, if I type "1987" into a field specified this way, the parser gets completely confused. OTOH, for year-only, the datepicker is probably more work than it's worth. So perhaps we should just have a different code path in this case?