Add read-only boolean form field widget.
Add read-only boolean form field widget.

Developers should be able to view, but not change, the User's agrees_to_tos
state.

Patch by: Todd Larsen
Review by: to-be-reviewed

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%401397

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son