[gmf-dev] [GMF - API CHANGE] Bugzilla#129803 : Added DiagramEditingDomai

[Cherie Mahoney <cmahoney@xxxxxxxxxx>]

Description:
- Created DiagramEditingDomainFactory installs a listener on the editing
domain so that the notation model can be updated as needed in response
to events when the diagram editor is not open.  
- Added getInstance() method to GMFEditingDomainFactory
and DiagramEditingDomainFactory.

New API Availability: 
now

Old API Removal: 
n/a

Tracking:                  
      
Bugzilla #129803

Clients Taken Care of:         
gmf

Other Clients' Action: 
- Clients using GMF diagrams should create their editing domain using the
DiagramEditingDomainFactory and not the GMFEditingDomainFactory.  The
DiagramEditingDomainFactory installs a listener on the editing domain so
that the notation model can be updated as needed in response to events
when the diagram editor is not open.  If a client needs to specialize
the editing domain, they can should subclass from DiagramEditingDomainFactory.
-   If clients were using GMFEditingDomainFactory.INSTANCE
this would not create a GMFEditingDomainFactory instance.  Use getInstance()
instead.

Thanks, 
Cherie