* Notice first time users per-site; instead of loading default comments, check to see if a per-site json URL exists
** if 404, load the default set, one time prompt the user that a per-site set was not found, and link them to a wiki page for how to contribute per site sets
** If 200, etc download the json data, merge it with the default set json, and prompt the user that a per-site comment set has been found and loaded, one time prompt the user about how to contribute changes back
* on subsequent visits