readme, add rrsprintf.h

README.md

@@ -8,7 +8,7 @@ single-file public domain libraries for C/C++ <a name="stb_libs"></a>
 library    | lastest version | category | LoC | description
 --------------------- | ---- | -------- | --- | --------------------------------
 **[stb_vorbis.c](stb_vorbis.c)** | 1.09 | audio | 5399 | decode ogg vorbis files from file/memory to float/16-bit signed output
-**[stb_image.h](stb_image.h)** | 2.12 | graphics | 6755 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
+**[stb_image.h](stb_image.h)** | 2.13 | graphics | 7099 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
 **[stb_truetype.h](stb_truetype.h)** | 1.12 | graphics | 3287 | parse, decode, and rasterize characters from truetype fonts
 **[stb_image_write.h](stb_image_write.h)** | 1.02 | graphics | 1048 | image writing to disk: PNG, TGA, BMP
 **[stb_image_resize.h](stb_image_resize.h)** | 0.91 | graphics | 2578 | resize images larger/smaller with good quality
@@ -28,7 +28,7 @@ library    | lastest version | category | LoC | description
 **[stb_leakcheck.h](stb_leakcheck.h)** | 0.2 | misc | 124 | quick-and-dirty malloc/free leak-checking
 
 Total libraries: 19  
-Total lines of C code: 47970
+Total lines of C code: 48314
 
 
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