Webern Mx Versions Save

The new headers were missing from mxiOS and mxmacOS frameworks, added these in the Xcode project.

Breaking Changes

• Add support for new-page attributes and page layout #94
• The LayoutData layout field of ScoreData has been renamed to DefaultsData defaults #94
  • What used to be the LayoutData class has been renamed to DefaultsData.
  • This name change freed up the name LayoutsData to be used for a new class that better fits the name.
• The std::set<SystemData> systems field of ScoreData has been replaced by std::map<MeasureIndex, LayoutData>. #94
  • LayoutData is a new class (not to be confused with DefaultsData which previously held the name).
  • LayoutData holds a SystemData and a PageData (new) to specify system and page layout.
• Some recurring data patterns were factored out into new classes. #94
  • The existing classes affected by these changes are:
    • DefaultsData (which used to be called LayoutData).
    • SystemData
  • The new classes are:
    • LeftRight
    • MarginsData
    • PageLayoutData
    • PageMarginsData
    • SizeData
    • SystemLayoutData

Other Changes

• Bump C++ standard to 17 #93
• Support non-traditional key signatures in mx::api. #81
• Add a constructor for PitchData. #90
• Provide a hint in the exception message when a zip file is attempted. #67
• Update the readme fairly substantially. #91
• Add a changelog. #97
• Hide the independence of the XML parser to reduce confusion about dependency management. #79
• The introduction of std::optional as a pattern for specifying optional data. #94

Mostly internal changes related to the xml parser.

mx::api somewhat stabilized.

This release presents a new, simpler interface for manipulating the MusicXML file. The new interface is in the api namespace. MusicXML Version 3.0.

This version adds the ability to import MusicXML files.