Version 8.3.0

• Add the "userDefined" attribute to the CustomField class to allow caller to determine if the field has been created by a user or MPXJ.
• Add support for reading expense items, expense categories and cost accounts from XER files, PMXML files and Primavera databases.
• Add support for writing expense items, expense categories and cost accounts to PMXML files.
• Updated the XER file reader to ignore invalid records rather than reporting an error, matching the behaviour of P6
• Updated the XER file reader to ensure that activity suspend and resume dates are read correctly.
• Updated the XER file reader to ensure that if the reader returns the project selected by the caller when the caller supplies a value for project ID.
• Updated PMXML reader to avoid user defined field collisions.
• Updated PMXML reader to add setProjectID and listProjects methods.
• Update the .net extension method ToIEnumerable to work with java.lang.Iterable rather than java.util.Collection