ATV Modulator plugin
It is now possible to produce analog TV signals that are mostly used by amateur radio nowadays. This modulator plugin matches the ATV demodulator plugin on the receiving side. It is possible also to receive the signal on a hardware analog TV set provided the generated signal has enough bandwidth.
More information here: https://github.com/f4exb/sdrangel/tree/master/plugins/channeltx/modatv
Note that you will need to install OpenCV development files to be able to compile this plugin. On Debian/Ubuntu the package is libopencv-dev
Other changes
NFM demod plugin
New discriminator for NFM demod based on new atan2 approximation. Added a squelch mode based on FM excursion.