[issue #166] include ties when copy-and-paste rhythms
Catch error when user cancels dialog
Allow reference of existing context
...without creating a new part
Support shortInstrumentName
Support for staff groups
Continue restructure
Merge pull request #482 from PeterBjuhr/bugs-issues

Issues with rhythm modifications
handle user cancel without running code and only then erroring out

the input dialog returns None if the dialog was canceled
upd chlog
Avoid doubled looping
More restructuring
support duplex mode in music print dialog
Merge branch 'master' of github.com:wbsoft/frescobaldi
Support group name
Support for nested groups
Add MXL option in musicxml2ly import dialog
Support of more staff types
Merge pull request #484 from PeterBjuhr/musxml2ly

Add MXL option in musicxml2ly import dialog
Avoid double barlines
Fix multiclef regression