Port of Duke Nukem 3D

This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.

Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9

apps/plugins/sdl/SDL_image/README

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+
+SDL_image 1.2
+
+The latest version of this library is available from:
+http://www.libsdl.org/projects/SDL_image/
+
+This is a simple library to load images of various formats as SDL surfaces.
+This library supports BMP, PNM (PPM/PGM/PBM), XPM, LBM, PCX, GIF, JPEG, PNG,
+TGA, and TIFF formats.
+
+API:
+#include "SDL_image.h"
+
+	SDL_Surface *IMG_Load(const char *file);
+or
+	SDL_Surface *IMG_Load_RW(SDL_RWops *src, int freesrc);
+or
+	SDL_Surface *IMG_LoadTyped_RW(SDL_RWops *src, int freesrc, char *type);
+
+where type is a string specifying the format (i.e. "PNG" or "pcx").
+Note that IMG_Load_RW cannot load TGA images.
+
+To create a surface from an XPM image included in C source, use:
+
+	SDL_Surface *IMG_ReadXPMFromArray(char **xpm);
+
+An example program 'showimage' is included, with source in showimage.c
+
+JPEG support requires the JPEG library: http://www.ijg.org/
+PNG support requires the PNG library: http://www.libpng.org/pub/png/libpng.html
+    and the Zlib library: http://www.gzip.org/zlib/
+TIFF support requires the TIFF library: ftp://ftp.sgi.com/graphics/tiff/
+
+If you have these libraries installed in non-standard places, you can
+try adding those paths to the configure script, e.g.
+sh ./configure CPPFLAGS="-I/somewhere/include" LDFLAGS="-L/somewhere/lib"
+If this works, you may need to add /somewhere/lib to your LD_LIBRARY_PATH
+so shared library loading works correctly.
+
+This library is under the zlib License, see the file "COPYING" for details.