Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.
Mark packages that don't or might probably not have staged installation.

Log message:
Import py26-traits-3.4.0 as wip/py-traits.

The traits package provides a metaclass with special attributes that are
called traits. A trait is a type definition that can be used for normal
Python object attributes, giving the attributes some additional characteristics:

 * Initialization: A trait attribute can have a default value
 * Validation: A trait attribute is manifestly typed.
 * Delegation: The value of a trait attribute can be contained in another
   object
 * Notification: Setting the value of a trait attribute can fired
   callbacks
 * Visualization: With the TraitsUI package, GUIs can be generated
   automatically from traited objects.