Various fixes for WAV and LPCM format
Windows setup and release/debug binaries in assets.
Linux Appimage for Ubuntu 20.04 and later in assets.
- a fix for LPCM (raw) audio format on Moode Audio Player by letting the URL file extension reflect the audio type.
- make the WAV format header more correct/compatible. Note that MPD (ffmpeg/wav plugin) tries to use HTTP ranges (to parse the WAV header) which are unsupported and this leads to a couple of extra HTTP requests but it still plays the WAV.
- reduce the HTTP response contentlength header from u64::MAX to u32::MAX. If this makes play stop after some 6 hours just enable autoresume.