Simplify license display to reflect plans for license terms

Right now we have two sets of radio buttons that really should just be
two checkboxes. Specifically:

Allow Edit: "only with permission" and "never" seem to essentially mean the
same thing, so we collapse them.

Allow use on website: downloading as an MP3 doesn't really seem to be a thing
stations care about offering, and if they do they are always welcome to ask.
Thus, we can simplify the choice to whether or not streaming on a licensee's
website is ok.

At this point, I'm just updating the representer to show this, so that it's easier to show the badges on the story page. In the future, we will need to run a migration and update the edit interface. Because these changes are purely subtractive (that is, we are only taking away privileges that were granted, and non-retroactively) we shouldn't even need permission - this is an extremely straightforward simplification.