[General] Wiki area changes

[Jared Rhine]

There has been an update in the list of official wiki areas on 
chandlerproject.org.

The new areas:

   http://chandlerproject.org/Planning
   http://chandlerproject.org/Developers
   http://chandlerproject.org/Notes

have been created and added to the top navigation bar.

The areas "Projects' and "Journal" have been removed from the top 
navigation bar, but all content remains.

The previous EngineeringArea page was moved to be Developers/WebHome 
(old page gone because moved).  And same for PlanningArea -> 
Planning/WebHome and NotesArea -> Notes/WebHome.

-- Jared