Log Message:
Update to 0.14:

* FF and SF Predecessors #140561 (Kurt Maute)
* Simple priority scheduling (Matteo Nastasi): Use the 
  --enable-simple-priority-scheduling option when building. This feature will
  allow a high priority task to steal resources from a lower priority task.
* View Non-standard working/nonworking days (Matteo Nastasi): In the Gantt 
  view, this feature shows where resources have differences in working and
  nonworking days when compared to the default calendar.
* Resource Usage view canvas interactivity (Alvaro del Castillo): Right
  clicking on a usage bar or resource pops up an option menu.
* Gantt chart misalignment with tree view #128983 (Francisco Moraes)
* Summary tasks: work now equals sum of child tasks #305801 (Kurt Maute)
* Eliminate effects of resource assignments on summary tasks #151604 
  (Kurt Maute): Assigning a resource to a summary task now has no effect.
* Update user guide: (Kurt Maute)
* View Grid Lines in Gantt view #303374 (Nguyen Thái Ngoc Duy): Shows
  horizontal lines in Gantt to help visually line up tasks with Gantt bars.