- added store and model for groups

  Now hiding start- and end date by default

  Removed debugging columns

  - Changed Gantt structure to exclude the main project_id as root
  - New tasks now receive new object_ids from the server

  - Added renumbering of sort_order after moves, inserts or deletes
  - Moved redraw() into onIdle event for lazy/delayed redraw
  - Fixed help menu
  - other minor changes

  Fixed AlphaMenu URL for the ticket tracker

  - Now with persistent state
  - Moved currentUserId() function from PreferenceStateProvider to Utilities

  Added colum project_nr

  Now showing SLAs and ticket with different icons in project tree

  Now catching the case that a user is not found,
  avoiding a ExtJS bug further down the road.

  Fixed Alpha Menu

  State store/retreive now works

  - moved PO.class.CategoryStore to PO.store.CategoryStore
  - Added a PreferenceStateProvider.js based on SenchaPreference,
    that still needs debugging

  - Continued refactoring code
  - Moved ResizeController to sencha-core, because
    it is a reusable part
  - Fixed issue with GanttBarPanel surface.size

  Reorganizing source

  - Reorganized files into local library for GanttEditor
  - Moved Tree related events into a GanttTreePanelController

  - Fixed more date issues for Firefox
  - Switched to MS-Project style dependency arrows

  Added Utilities class for data conversion functions

  - Now runs on FireFox after fixing data parsing issues

  - Moved GanttBarPanel to library (not sure that's right...)
  - Fixed syncroneous loading issue with several panels
  - Added debug to all important elements

  - Cleaned up AbstractGanttEditor

  - Adapted to new end_date semantics
  - Added custom conversion functions for
    PostgreSQL date format

  - Changed dependencies to be stored with task information
  - Fixed dependency direction

  Fixed scrolling issue for DnD of Gantt bars

  - Fixed DnD percent vs. resize handles
  - Refactored and beautified code

  WIP working on drag-and-drop

  - Removed button enable after edit -
    now part of ButtonController

  Added a GanttSchedulingController to handle the resizing
  of super-tasks based on the information of their sub-tasks

  Working on DnD for size and %done

  - Added "%Done" field with calculated %done figures
    based on sub-tasks

  Started to work on Gantt bars

  Fixing minor errors creating/deleting tasks