Mpxj

* Add support for reading SDEF files.

* Add support for reading data links (linked fields) configuration from MPP files.
* Updated to avoid an infinite loop when processing certain corrupt files (Contributed by ninthwaveltd).
* Update MSPDI generation to ensure MS Project correctly recognises complete tasks without resource assignments.
* Ensure that activity codes are read for P6 schedules.
* Improve support for reading custom field values derived from custom field lookup tables in MPP files.
* Improve support for MPP files written with the June 2019 update of Microsoft Project.

* Improve handling of task baseline start, start, baseline finish, finish and slack fields read from FTS files.

* Improve handling of MPP files with missing Props.
* Improve handling of custom field lookup tables for MPP12 files.
* Correctly write activity duration type to a PMXML file (Contributed by Sebastian Stock)
* Improve handling of Activity Type and Activity ID when writing PMXML files (Based on a contribution by Sebastian Stock)
* Update PMXML file reader for greater consistency with XER and P6 database readers (Activity ID, Activity Type, Status, and Primary Resource ID)
* Improve handling of certain FTS files.
* Improve handling of task notes from MPP8 files.
* More accurately read predecessors and successors from Asta PP files (Based on a contribution by Dave McKay)
* When a schedule is read from P6, P3, or SureTrak, Task.getSummary will return true only if a task is part of the WBS
* Improve support for reading the Synchro Scheduler 2018 SP files.
* Added Task.hasChildTasks() method.
* Fixed [Issue 330](https://sourceforge.net/p/mpxj/bugs/330): Splits data coming in as null for all tasks

* Improve support for reading the Synchro Scheduler 2018 SP files.
* Add support for reading Gantt Designer GNT files.
* Improve handling of non-standard MSPDI files.
* Improve handling of non-standard GanttProject files.
* Update MSPDI generation to ensure MS Project correctly recognises complete milestones without resource assignments.
* Improve support for reading user defined fields from PMXML files.
* Ignore hammock tasks when reading PP files.

* Added support for reading and writing GUIDs for Tasks, Resources, and Assignments in MSPDI files.
* Updated Java build to use Maven
* Updated to provide a general performance improvement (Based on a contribution by Tiago de Mello)
* Updated to fix an issue when the Microsoft JDBC driver is used to access a P6 database in SQL Server 2005
* Fixed [Issue 332](https://sourceforge.net/p/mpxj/bugs/332): Asta lag sign incorrect (Based on a contribution by Dave McKay)
* Fixed [Issue 333](https://sourceforge.net/p/mpxj/bugs/333): Asta constraints lost (Contributed by Dave McKay)
* Fixed [Issue 335](https://sourceforge.net/p/mpxj/bugs/335): MSDPI into Asta doesn't import Calendar exceptions (Contributed by Dave McKay)