First cut at class interfaces and stubs for implementations for the new osgShadow NodeKit

src/osgShadow/Version.cpp

@@ -0,0 +1,12 @@
+#include <osgShadow/Version>
+
+const char* osgShadowGetVersion()
+{
+    return "1.2";
+}
+
+
+const char* osgShaodowGetLibraryName()
+{
+    return "OpenSceneGraph Shadow Library";
+}