An improved version of FreqShow (https://github.com/adafruit/FreqShow) including improvements from WQ7TPanadapter (https://github.com/Banjopkr/WQ7Tpanadapter)
- Layout optimized for larger screens (tested on the raspi 7" LCD)
- Touchpad driver for the raspi GPU touchscreen device (FT5406)
- Uses SoapySDR instead of pyrtlsdr, supporting many more SDR devices
- Supports decimation, allowing higher-sample-rate devices to work without
overloading the CPU.
- TODO: Add decimation to the GUI
- Optimized windowing and waterfall rendering to reduce CPU usage.