When playing a song by ID (e.g. following a Google link), we should display banner asking for donation to artist

[JudahGabriel]

We should encourage users who follow direct song links from Google to donate to the artist.

Some artists have expressed concern that users search for a song of theirs on Google, and the first link that comes up is a direct link to that song on Chavah. This is both good and bad: good that users get what they want, but bad that artists aren't compensated for that.

One thing that might help alleviate this, and financially help artists, would be to display a banner when a user follows a direct song link from Google. It would display as a banner at the top of Chavah, something like:

"Like this song? Donate to Ted Pearce to support Messiah's musicians."