Rosegarden updated to v1.5.1

Rosegarden has been updated to v1.5.1. This is a minor bug-fix release of the 1.5 series.

Changes:

• Avoid xruns on exit.
• Fix the guitar clef (was treble -15, should be treble -8).
• Fix failure to export all tracks when exporting to MIDI.
• Fix export of empty lyrics to Lilypond.
• Make project packager errors a bit more helpful.
• Skip non-MIDI tracks when exporting to Lilypond.
• Initialize LADSPA plugin buffers to zero if running only for latency calculation.
• Don't send bank or program changes for unused instruments (it could override program changes for instruments that are in use).
• Fix incorrect label display on track buttons after popping up but not selecting from the right-button menu, if Show Track Labels is not set.
• Add a couple of new instrument definitions.
• Update Swedish, Czech and Japanese translations.