[interchange] Improve application/json POST support

[Peter]

On 12/30/2014 10:02 AM, David Christensen wrote:
> +use JSON ();

...

> +					$CGI::json_ref = JSON::from_json($$CGI::post_ref);

You've added in JSON as a requirement here, but it's not (last time I
checked) part of core perl and it's not listed as a module in
Bundle::Interchange (or even Bundle::InterchangeKitchenSink).  Please
add in code that makes this optional so we don't break existing IC sites
when they upgrade.

Mike, should JSON be a part of KitchenSink?


Peter