create iframe for embedding survey

[rawray7]

i have no idea if this is possible in the context of sandstorm, but it would be cool if (like google forms) you could get iframe embed code as a method of sharing the survey, instead of a direct link. in my view, the key advantage is that the survey would be hosted on a different domain than sandstorm. for example, i can image people getting weirded out by getting routed to 'something.sandcats.io', and not taking the survey for that reason. it would overall just be a smoother user experience if it were embeddable.