Log Message:
Update get_iplayer to 3.01

 * Fix "Segment not available from server" errors
 * The --cache-init option. Use --cache-rebuild instead when upgrading.
 * The SRT subtitles produced by get_iplayer now include <font> tags to
   preserve the colour information from the TTML originals.
 * get_iplayer now supports the BBC "bidi" CDN, so additional streams
   are available for TV programmes.
 * hvf modes (the default) for TV programmes will now produce files
   with 320k audio, if available. 320k audio is not available for hls
   or dvf modes.

Full release notes available fromt:

  https://github.com/get-iplayer/get_iplayer/wiki/release301