Moved NativeInit() to separate sdl_main shared library so libapplication.so won't contain any java-specific code,

added SDL_image, libpng and libjpeg.

alienblaster/project/src/DemoActivity.java

@@ -53,7 +53,9 @@ class LoadLibrary {
         System.loadLibrary("tremor");
         System.loadLibrary("sdl");
         System.loadLibrary("sdl_mixer");
+        System.loadLibrary("sdl_image");
         System.loadLibrary("application");
+        System.loadLibrary("sdl_main");
     }
 }