musescore/MuseScore — pull request #483 by softins (2013-09-20 22:39:32+00:00)
Title: Add rendering of capo chords, and capo setting.

For now, the capo position is a ChordName style setting. In the
future, it can be enhanced to allow capo position to be changed
within a score, using something like TempoMap or TimeSigMap.
If capo position is non-zero, the chord to be played with capo
applied is shown in brackets after the standard chord.