FAQ update needed -- musescore.com API is no more.

The FAQ (which I can't edit) says "MuseScore.com is a community site to share your sheet music with your friends via the web and for the mobile apps for iOS and Android. The site has social features such as embedding, commenting, annotating, statistics, groups and it comes with an open API for third party developers. The site offers free accounts, but has a Pro Account for those who want more."

As of a couple of weeks ago, the API was shut down without warning as someone was abusing it. You can do almost anything it could do by scraping web pages. To anyone who replies to that with "but ... but ... there's no insurance that it won't change without warning in the future", go back and read the beginning of this paragraph.