Percussion Clef

There needs to be the option to add/change to a percussion clef from a treble or bass clef. This is necessary to write more complex percussion parts in a way which is easily readable to a performer. 

Additionally, I would love for percussion timbres to be more easily incorporated into the software. As the program stands now it is not possible to get a quality midi realization of percussion instruments as we are missing standard instrument patches such as triangle, tambourine, etc.