OpenSongApp - Songbook

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Added MIDI click track and MIDI clock master options
Added MIDI shorthand and control setup page for TC Helicon Voice pedals
PDF export allows for multiple columns when fit to page is selected
Added option to allow song selection using MIDI (using MSB and PC commands)
Instrument tab feature added to abc notation
Inline abc notation (within song lyrics) added
Importing of OnSong (iOS) html set list
Various bug fixes