Pitch needs an octave

[nuncaeslupus]

Sorry, didn't know the best way to make you know. I tried a PR, but I had no permissions.

Pitch can not be created without an octave.

quickly/quickly/key.py

Line 229 in 79fa75a

p = pitch.Pitch(self.note, self.alter)

[nuncaeslupus]

I think I confused Pitch with lily.Pitch, so I'm not sure if that's still valid.