MacOS: Add static binaries to build

[atruskie]

The Windows version of this package is easiest to use because we bundle all our external tools as binary assets.
It looks like there are MacOS binary builds that could work in a similar manner - that is at least for ffmpeg.

This is important for all binaries as well if we wish to avoid an install step (e.g. wvunpack, sox, etc)

Expected behaviour

MacOS should be able to run AP.exe without installing any additional audio tools.

Actual behaviour

All our audio tools need to be installed as a separate install step.

Any other details

Remember to update the paths in App.config

Perhaps worth investigating if there are any static builds of ffmpeg that can be used for Linux as well?

[atruskie]

Fixed in e33e445, 265fa0d, 1641de9, 28edc79