Mpxj

* Improve support for reading MPP files generated by Project 2016
* Handle missing time component of a time stamp field when reading an MPX file.

* Improve support for reading MPX files generated by SureTrak

* Fix WBS and Activity ordering for tasks from Primavera.

* Strip unescaped control characters from JSON output.

* For schedules imported from Primavera ensure tasks representing activities are ordered by Activity ID within the WBS to match Primavera.

* Avoid NPE when writing MSPDI files with timephased data (contributed by Bruno Gasnier)
* Improve resource assignment constructor (based on a contribution by Bruno Gasnier)
* Improve MPX French translations (contributed by Bruno Gasnier)
* Add calendar specific minutes per day, week, month, and year (based on a contribution by Bruno Gasnier)
* Add support for reading and writing GUID attribute for PMXML, XER files and Primavera database.