Replace references to "adv" with "core" in classes documentation

All classes previously in "wxadv" are now in "wxcore".

interface/wx/laywin.h

@@ -102,7 +102,7 @@ enum wxLayoutAlignment
     previous events in order to calculate window sizes.
 
 
-    @library{wxadv}
+    @library{wxcore}
     @category{winlayout}
 
     @see wxSashEvent, wxSashLayoutWindow, @ref overview_events
@@ -165,7 +165,7 @@ public:
     for you. However, if you use sashes, see wxSashWindow for relevant event information.
     See also wxLayoutAlgorithm for information about the layout events.
 
-    @library{wxadv}
+    @library{wxcore}
     @category{miscwnd}
 
     @see wxLayoutAlgorithm, wxSashWindow, @ref overview_events
@@ -297,7 +297,7 @@ public:
         from a window.
     @endEventTable
 
-    @library{wxadv}
+    @library{wxcore}
     @category{events}
 
     @see wxCalculateLayoutEvent, wxSashLayoutWindow, wxLayoutAlgorithm.
@@ -386,7 +386,7 @@ wxEventType wxEVT_QUERY_LAYOUT_INFO;
         'bite' out of a rectangle provided by the algorithm.
     @endEventTable
 
-    @library{wxadv}
+    @library{wxcore}
     @category{events}
 
     @see wxQueryLayoutInfoEvent, wxSashLayoutWindow, wxLayoutAlgorithm.