iPlayer Downloader maintenance update

I’m releasing a quick update today with a bug fix and a couple of enhancements.

Command-line tool:

• Accepts multiple PIDs once again (broken in previous release)
• Has a --dry-run option to skip the download step

Both GUI and command-line tool:

• Can extract the PID from URLs on http://www.bbc.co.uk/programmes.

The Windows executable was built on Windows 2000 this time. I don’t think that should cause any problems, but let me know if it breaks anything!

The files are on the project page.