include a sample `alsamixer.rc` file?

alsa-project/alsa-utils issue #112 was opened from int-e:

I think it would be useful to include an example `alsamixer.rc` file; see https://gist.github.com/int-e/25bd77d4e59531fad7d48bfaf1fc1046 for a candidate.

In particular this example replicates the default color theme, making it easier to adjust (say, replace `default` by `black` to get sane colors back in terminals with bright backgrounds). The default keybindings are also replicated but that's probably less useful.

Issue URL : https://github.com/alsa-project/alsa-utils/issues/112 Repository URL: https://github.com/alsa-project/alsa-utils