This plugin executes arbitrary script specified in subscription with
script: URI protocol, then parse the STDOUT from the script to
create a feed.
The output from the script can either be Atom/RSS feed, or YAML format
which is compatible to the one used in CustomFeed::Debug. This means
you can reuse your something2rss script used for NetNewsWire or
similar tools, and you can even write your scraper code in other
languages like Python/Ruby.
This plugin auto-detects if the output is XML or YAML.