Log Message:
Changes 0.10.0:
* audio2tape can now recognise standard ROM loaders.
* tzxlist now outputs block and tape lengths.
* snap2tzx: add 0.1s pause between blocks to ensure a gap between edges.
* tapeconv: add options for embedding metadata into the created file.
* tape2wav: ensure pulses do not get rounded down inappropriately.
* Allow building without libaudiofile.