Sheet Music Page Renovated

In response to a reader request from heuertag I've reworked the sheet music page to work like the forgemap database, the gamertag database, and the movies database. Now you can search and sort the sheet music entries just like you can on those other pages. The default page shows all entries in alphabetical order by title, but you can filter by one or more games, see the newest or oldest first, or group them by author.