Working on a project where I need to be able to pipe audio both into and out of direwolf.

Sending audio to stdout means status text needs to redirect to stderr, so also added command-line option to redirect the output of dw_printf and the color escape sequences.

Since the buffer operations were pretty much identical, went ahead and added UDP sending as an audio output option as well. I'm not aware of any utilities available that can do anything with UDP sent data like that to try to test against though.

I've tried to test as much as possible for both outputs on Windows and Linux, including sending back and forth between the two platforms, but I don't have a Mac available to check if they work on that side.

If something looks weird or prefer to be implemented in a different way, I'm glad to continue to edit.