Code review comment for lp:~mixxxdevelopers/mixxx/features_m4a_win7

Let me first formally say here: thank you for your work on this, Bill!

Yeah, I saw the update sizes after I said that. We can (and should) provide a pop-up box with links to the updates when ppl click on the M4A build/plugin on the downloads page (like we did for PortAudio on Ubuntu 8.04.)

Also, I strongly recommend making this a plugin rather than a separate build for supportability and less confusion. That way, no matter where people get Mixxx, they can just download the plugin (and the OS update if needed) and they're good to go. And we can even ship the plugin with Mixxx (if it's legal to do so and it will just silently not load or do nothing on a system that doesn't have the OS support.)