From David Callu, improved consistency of Version strings and add version support

for osgIntrospection and osgManipulator.

src/osgGA/Version.cpp

@@ -24,7 +24,7 @@ const char* osgGAGetVersion()
 
 const char* osgGAGetLibraryName()
 {
-    return "OpenSceneGraph Gui Adapter Library";
+    return "OpenSceneGraph GA (Gui Adapter) Library";
 }
 
 }