Log Message:
Changes 1.0.0:
* New end of tape flag
* AF and AF' were swapped when reading and writing SZX files
* Support for Fuller Box and Melodik (and similar AY interfaces) in snapshots
* Support for Opus Discovery in snapshots
* Support for the NTSC 48K Spectrum
* Support for stereo sound files
* Add proper support for +2A/+3, Pentagon and Scorpion in .z80 files
* Various fixes for compiling with Visual Studio 6
* Various minor bug fixes/improvements:
* Looser signature checks for .dsk files
* --without-(bzip2|zlib) options to configure for Gentoo and similar
  distributions
* Handle querying the block length for turbo and pure data blocks
  with 0 length
* Fix loading of Warajevo TAPs with raw samples
* Fail sensibly if file decompression fails
* Remove various unused variables, initialisations etc