majalan

Copperbox revision 3213.

I've back out the changes that added Timeline to Context. I now feel only Score should have access to Timeline.

Once I add Timeline to Score, I can implement a placement API for parts that uses symbolic positions (bar and beat number) rather than absolute onset times. Putting tempo and time signature back into event lists simplifies them and better allows for polyrhythms. Inheriting tempo and time signature from a global immutable timeline restricted polyrhythmic parts.