complex durations support

[Levitanus]

from quickly.dom import lily

print(lily.Duration(5 / 8).write())  # 2

When I have first seen the example with Duration(3/ 8).write() == "4." I was really excited as It was my first task in own project. But the example with 5/ 8 shows that some durations can be lost. I'm not sure that the best solution would be to make something like Duration(5/ 8).write() == "2~8" as it depends on the bar position. So here is an issue for discussion on the topic.

[wbsoft]

Indeed Duration can only express lengths in note-lengths and added dots, so a duration of 5/8 can't be expressed in one note. When constructing music you should break such durations in pieces, depending on the beats or bar positions.