- Disabled anything except Finish-to-Start dependency in
  the GanttSchedulingController
- Still need to adapt display in GanttBarPanel

- Fixed permission issue creating Gantt tasks of a customer
  who is PM of a project

  to be preceeded by a "return"

  SQL storage, so there will be a deterministic update
  order.
  This fixes a bug in cosine where im_projects was updated
  after im_timesheet_tasks, thus overwriting the percent_
  completed values set by a trigger on im_timesheet_tasks

- Added ns_log Error statements

  JSON messages can't have multiple lines...

  faking users

  Added feature to load partial trees, as used by Sencha

  but not stored in the DB yet

  Beautified code, removing duplicated code

  Fixed issue that error messages weren't passed back to the server correctly