• Better input signal filtering - reduced bit error rate, 10-50% more
  messages successfully decoded.
• SDRPlay: major bugfixes in sample buffer handling code - shall now
  perform equally well as RTLSDR (or even better).
• SDRPlay: --gain knob replaced with --gr (gain reduction). This makes
  gain configuration in dumpvdl2 compatible with other SDRPlay apps.
  See README.md for details.
• SDRPlay: support for selecting device by serial number.
• Added optional build-time PLATFORM knob which sets CPU-specific
  compiler flags to optimize the code for various flavours of
  Raspberry Pi. Supported values: rpiv1, rpiv2, rpiv3.
• Other minor bug fixes