Re: Mixxx 2.3.0 released, switched to CMake, dependency changes

[Be <be@mixxx.org>]

Also there is a new dependency on libkeyfinder. We have forked this old 
library and added CMake support for it: 
https://github.com/mixxxdj/libkeyfinder

The only other currently maintained program which uses libkeyfinder is 
keyfinder-cli. The original KeyFinder GUI application is unmaintained 
and does not build with current versions of libav nor FFmpeg (it was 
easier to add libkeyfinder support to Mixxx than getting that to build).