Add temple blocks instrument
As discussed at https://musescore.org/en/node/91881, the "Temple Blocks" instrument in MuseScore 2.0.2 is nothing like actual temple blocks, defining only two pitches. ChurchOrganist has since created a basic five-note temple blocks DRM file and added a similarly basic temple blocks preset to the FluidR3Mono SoundFont, both available at https://musescore.org/en/node/41521#comment-406311, but the preset is not accessible to percussion, and the drumset is not defined in instruments.xml.
No orchestra would be without a set of temple blocks, and MuseScore shouldn't be, either. What would it take to properly implement this?