Ported osgUtil, osgDB, osgGA, NodeKits and plugins to compile against OpenGL ES 1.1 and OpenGL ES 2.0.

src/osgPlugins/dds/ReaderWriterDDS.cpp

@@ -35,6 +35,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#if defined(OSG_GLES1_AVAILABLE) || defined(OSG_GLES2_AVAILABLE)
+    #define GL_RED                  0x1903
+    #define GL_LUMINANCE4_ALPHA4    0x8043
+#endif
 
 // NOTICE ON WIN32:
 // typedef DWORD unsigned long;