Add and rework instruments

[LenweSaralonde]

Add instruments :

• [x] Accordion
• [x] War horn (shofar)
• [x] War drum

Rework instruments :

• [x] Hammered dulcimer: Replace soundfont
• [x] Celtic harp: Replace soundfont
• [x] Renaissance lute: Replace soundfont
• [x] Recorder: Replace soundfont
• [x] Male tenor voice: Replace soundfont
• [x] Female soprano voice: Fix looping and rework out of range notes using iZotope Radius
• [x] Fiddle: Replace soundfont
• [x] Bagpipe: Replace soundfont
• [x] Cello: Replace soundfont by viola da gamba
• [x] Trumpet: Replace soundfont by natural trumpet
• [x] Trombone: Replace soundfont by sackbut
• [x] Bassoon: Replace soundfont
• [x] Clarinet: Replace soundfont
• [x] Traditional percussions: Replace samples

Misc:

• [x] Add instrument credits information in about window