Added new osgGA - GUI Adapter library submitted by Neil Salter. This will

replace the current GUI adapter code inside osgUtil.

src/osgGA/Version.cpp

@@ -0,0 +1,12 @@
+#include <osgGA/Version>
+
+const char* osgGAGetVersion()
+{
+    return "0.8.45";
+}
+
+
+const char* osgGAGetLibraryName()
+{
+    return "Open Scene Graph Gui Adapter Library";
+}