journalism award signals

I did a bit more work on the Journalism Awards, framing it as a general 
signal and one more specific signals.

I put them into the "reviewed signals" draft, marked as "pending".

Here's a dated version of that draft: 
https://credweb.org/reviewed-signals-20200219/ (The undated version 
presumably wont show them as pending after today, which could confuse 
someone reading this later.)

Meeting in about 3 hours, as usual. Agenda 
<https://docs.google.com/document/d/1-KcB121I6D6J2ZdQET-qatqCaqv3ttlZkfhgyWEk7nM/edit>.

        -- Sandro