Build and install sndc

Only Linux is tested but being written in ANSI C with almost no dependencies, it should build on any platform.

You will need libfftw3 to build sndc.

Type the following in a terminal.

$ git clone https://pedantic.software/git/sndc
$ cd sndc
$ make

You can install sndc and its wrappers with make install, optionally setting PREFIX if you want to install it in a different directory than /usr/bin.

Test that the install worked with sndc -h.