Version 9.1.0

• Add methods to the ProjectFile class to attach a ProjectFile instance as a baseline. The baselines attached to the ProjectFile will be used to populate the relevant baseline attributes in the current schedule.
• Added experimental support for writing baseline projects to PMXML files.
• Added the Project GUID attribute.
• When reading PMXML files, the list of projects returned by the readAll method will include any baseline projects present in the file.
• When reading PMXML files which include the current baseline project, use this to populate the relevant baseline attributes in the main schedule.
• The Project Unique ID property is now an integer rather than a string.
• When reading Primavera schedules, populate the project properties Project ID and Baseline Project Unique ID.
• Handle Primavera resource rates which don't have a start or finish date.
• Handle MSPDI files with resource availability tables which don't have a start or finish date.
• Ensure that the Activity ID field is populated consistently for WBS entries in PMXML files compared to the same schedule read from an XER file or P6 database.
• Ensure duration of manually scheduled tasks in MPP files is represented correctly.