Exclude OpenGL versions of Graphics library classes from Doxygen documentation to avoid classes being listed twice.

Doxyfile

@@ -707,7 +707,8 @@ EXCLUDE_SYMLINKS       = NO
 # for example use the pattern */test/*
 
 EXCLUDE_PATTERNS       = */*API*.cpp \
-                         */*API*.h
+                         */*API*.h \
+                         */OpenGL/*
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names 
 # (namespaces, classes, functions, etc.) that should be excluded from the 

Engine/Audio/Audio.h

@@ -37,7 +37,7 @@ class AudioImpl;
 class Sound;
 class SoundSource;
 
-/// %Audio subsystem. Uses either DirectSound or SDL for sound output
+/// %Audio subsystem.
 class Audio : public Object
 {
     OBJECT(Audio);