Log Message:
Changes 1.0.0:
* audio2tape
  * work with stereo sound files
  * don't crash on an empty ROM block
* tzxlist
  * print data from ROM header blocks
  * Assume non-ASCII characters are in Windows-1252
* snapconv: add -f flag to fix .szx files written with old
  versions of libspectrum
* raw2hdf: ensure version data is always written