
  OVERRIDE BEHAVIOR OF MANIFEST AND CONFIGURATION FILES 
  Integration Subsystems can be enabled and disabled independently of the content.
  Thus if Shortcuts are enabled, The client will use the shortcuts contained within
  the manifest by default.

  Each Integration Subsystem can contain an <Extensions /> node. If this child element
  is present, the client will ignore the content in the Manifest file for that subsystem
  and only use the content in the configuration file.

  e.g. for the shortcuts subsystem, 
  (A)
  if the user defined this in either the dynamic or deployment config file:
	  <Shortcuts  Enabled="true">
		  <Extensions>
			  ...
		  </Extensions>
	  </Shortcuts>

  Content in the manifest will be ignored.

  (B)
  IF the user defined only this:
	  <Shortcuts  Enabled="true"/>
  Then the content in the Manifest will be integrated during publishing.

  (C)
  note that if the user defines this:
	  <Shortcuts  Enabled="true">
		  <Extensions/>
	  </Shortcuts>

  Then all the Shortcuts within the manifest will still be ignored.
  There will be no shortcuts integrated.
