[JW Lua] Documentation update for FCCellMetrics:GetMusicStartPos()

[Jan Angermüller]

Jari,

maybe you could make the following sentence a bit more clear in the 
online documentation from FCCellMetrics::GetMusicStartPos():

Was: "Returns position where the music starts in the cell (after the 
key/clef/repeats)."

Should better be: "Returns position where the music starts in the cell 
(after the key/clef/repeats). It doesn't take into account the 'Spacing 
Before Music' and the 'Extra Space at Beginning' values. The note 
entries actually start at: MusicStartPos (from FCCellMetrics) + 
SpaceBefore (from FCDistancePrefs) + SpaceBefore (from FCMeasure)

The same additional sentence could be added to FCMeasure:GetSpaceBefore 
and FCDistancePrefs:GetSpaceBefore.

Best,
Jan