LEGACY_PLUGIN is now in full use:

*) for footprint access into *.mod files and 
*) BOARD save/load

The item_io.cpp and ioascii.cpp have been set off to the side for reference
as *.notused, for awhile.

The CMake options USE_NEW_PCBNEW_LOAD and USE_NEW_PCBNEW_SAVE are gone,
this is now the mandatory usage of the LEGACY_PLUGIN.  This should reduce
code maintenance for awhile until the s-expression plugin comes into 
play.  But at least for legacy format, there is not two code bodies
to maintain any more.

A new LEGACY_PLUGIN footprint library caching scheme is in place which 
needs some testing.  It should not be any faster, but might give better 
results in a networked environment if there is *.mod files on the server.

common/base_screen.cpp

@@ -111,15 +111,6 @@ void BASE_SCREEN::SetScalingFactor(double aScale )
 }
 
 
-void BASE_SCREEN::SetZoomList( const wxArrayDouble& zoomlist )
-{
-    if( !m_ZoomList.IsEmpty() )
-        m_ZoomList.Empty();
-
-    m_ZoomList = zoomlist;
-}
-
-
 bool BASE_SCREEN::SetFirstZoom()
 {
     if( m_ZoomList.IsEmpty() )