GDELT DOC 2.0 API Supports JSONFeed

The GDELT DOC 2.0 API now supports JSONFeed output format in ArticleList mode.

We've also made a number of enhancements to the export workflow, including appending the current date/time to output filenames when saving results in CSV format, avoiding problems when performing repeated exports of different topics. The date column for CSV export files also now automatically switches between day and day/time output formats.