renderer: enable buffering by default for standard formats
squash int removal of display
renderer: fixup several race situations and invalid calc of catch up
renderer: setup GetProcessorSize() to indicate number of surfaces needed

In the renderer case it means how many refs a single buffer can make use
of during render.

In the manager case it mean wanted buffer levels that codec can
take advantage of.
renderer: init as nothing new available
renderer: vda must release ref on release