Restore stb_image header credits.

Source/ThirdParty/STB/stb_image.h

@@ -1,3 +1,220 @@
+/* stb_image - v2.10 - public domain image loader - http://nothings.org/stb_image.h
+                                     no warranty implied; use at your own risk
+
+   Do this:
+      #define STB_IMAGE_IMPLEMENTATION
+   before you include this file in *one* C or C++ file to create the implementation.
+
+   // i.e. it should look like this:
+   #include ...
+   #include ...
+   #include ...
+   #define STB_IMAGE_IMPLEMENTATION
+   #include "stb_image.h"
+
+   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
+   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
+
+
+   QUICK NOTES:
+      Primarily of interest to game developers and other people who can
+          avoid problematic images and only need the trivial interface
+
+      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
+      PNG 1/2/4/8-bit-per-channel (16 bpc not supported)
+
+      TGA (not sure what subset, if a subset)
+      BMP non-1bpp, non-RLE
+      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
+
+      GIF (*comp always reports as 4-channel)
+      HDR (radiance rgbE format)
+      PIC (Softimage PIC)
+      PNM (PPM and PGM binary only)
+
+      Animated GIF still needs a proper API, but here's one way to do it:
+          http://gist.github.com/urraka/685d9a6340b26b830d49
+
+      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
+      - decode from arbitrary I/O callbacks
+      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
+
+   Full documentation under "DOCUMENTATION" below.
+
+
+   Revision 2.00 release notes:
+
+      - Progressive JPEG is now supported.
+
+      - PPM and PGM binary formats are now supported, thanks to Ken Miller.
+
+      - x86 platforms now make use of SSE2 SIMD instructions for
+        JPEG decoding, and ARM platforms can use NEON SIMD if requested.
+        This work was done by Fabian "ryg" Giesen. SSE2 is used by
+        default, but NEON must be enabled explicitly; see docs.
+
+        With other JPEG optimizations included in this version, we see
+        2x speedup on a JPEG on an x86 machine, and a 1.5x speedup
+        on a JPEG on an ARM machine, relative to previous versions of this
+        library. The same results will not obtain for all JPGs and for all
+        x86/ARM machines. (Note that progressive JPEGs are significantly
+        slower to decode than regular JPEGs.) This doesn't mean that this
+        is the fastest JPEG decoder in the land; rather, it brings it
+        closer to parity with standard libraries. If you want the fastest
+        decode, look elsewhere. (See "Philosophy" section of docs below.)
+
+        See final bullet items below for more info on SIMD.
+
+      - Added STBI_MALLOC, STBI_REALLOC, and STBI_FREE macros for replacing
+        the memory allocator. Unlike other STBI libraries, these macros don't
+        support a context parameter, so if you need to pass a context in to
+        the allocator, you'll have to store it in a global or a thread-local
+        variable.
+
+      - Split existing STBI_NO_HDR flag into two flags, STBI_NO_HDR and
+        STBI_NO_LINEAR.
+            STBI_NO_HDR:     suppress implementation of .hdr reader format
+            STBI_NO_LINEAR:  suppress high-dynamic-range light-linear float API
+
+      - You can suppress implementation of any of the decoders to reduce
+        your code footprint by #defining one or more of the following
+        symbols before creating the implementation.
+
+            STBI_NO_JPEG
+            STBI_NO_PNG
+            STBI_NO_BMP
+            STBI_NO_PSD
+            STBI_NO_TGA
+            STBI_NO_GIF
+            STBI_NO_HDR
+            STBI_NO_PIC
+            STBI_NO_PNM   (.ppm and .pgm)
+
+      - You can request *only* certain decoders and suppress all other ones
+        (this will be more forward-compatible, as addition of new decoders
+        doesn't require you to disable them explicitly):
+
+            STBI_ONLY_JPEG
+            STBI_ONLY_PNG
+            STBI_ONLY_BMP
+            STBI_ONLY_PSD
+            STBI_ONLY_TGA
+            STBI_ONLY_GIF
+            STBI_ONLY_HDR
+            STBI_ONLY_PIC
+            STBI_ONLY_PNM   (.ppm and .pgm)
+
+         Note that you can define multiples of these, and you will get all
+         of them ("only x" and "only y" is interpreted to mean "only x&y").
+
+       - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
+         want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
+
+      - Compilation of all SIMD code can be suppressed with
+            #define STBI_NO_SIMD
+        It should not be necessary to disable SIMD unless you have issues
+        compiling (e.g. using an x86 compiler which doesn't support SSE
+        intrinsics or that doesn't support the method used to detect
+        SSE2 support at run-time), and even those can be reported as
+        bugs so I can refine the built-in compile-time checking to be
+        smarter.
+
+      - The old STBI_SIMD system which allowed installing a user-defined
+        IDCT etc. has been removed. If you need this, don't upgrade. My
+        assumption is that almost nobody was doing this, and those who
+        were will find the built-in SIMD more satisfactory anyway.
+
+      - RGB values computed for JPEG images are slightly different from
+        previous versions of stb_image. (This is due to using less
+        integer precision in SIMD.) The C code has been adjusted so
+        that the same RGB values will be computed regardless of whether
+        SIMD support is available, so your app should always produce
+        consistent results. But these results are slightly different from
+        previous versions. (Specifically, about 3% of available YCbCr values
+        will compute different RGB results from pre-1.49 versions by +-1;
+        most of the deviating values are one smaller in the G channel.)
+
+      - If you must produce consistent results with previous versions of
+        stb_image, #define STBI_JPEG_OLD and you will get the same results
+        you used to; however, you will not get the SIMD speedups for
+        the YCbCr-to-RGB conversion step (although you should still see
+        significant JPEG speedup from the other changes).
+
+        Please note that STBI_JPEG_OLD is a temporary feature; it will be
+        removed in future versions of the library. It is only intended for
+        near-term back-compatibility use.
+
+
+   Latest revision history:
+      2.10  (2016-01-22) avoid warning introduced in 2.09
+      2.09  (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
+      2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
+      2.07  (2015-09-13) partial animated GIF support
+                         limited 16-bit PSD support
+                         minor bugs, code cleanup, and compiler warnings
+      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
+      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
+      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
+      2.03  (2015-04-12) additional corruption checking
+                         stbi_set_flip_vertically_on_load
+                         fix NEON support; fix mingw support
+      2.02  (2015-01-19) fix incorrect assert, fix warning
+      2.01  (2015-01-17) fix various warnings
+      2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
+      2.00  (2014-12-25) optimize JPEG, including x86 SSE2 & ARM NEON SIMD
+                         progressive JPEG
+                         PGM/PPM support
+                         STBI_MALLOC,STBI_REALLOC,STBI_FREE
+                         STBI_NO_*, STBI_ONLY_*
+                         GIF bugfix
+      1.48  (2014-12-14) fix incorrectly-named assert()
+      1.47  (2014-12-14) 1/2/4-bit PNG support (both grayscale and paletted)
+                         optimize PNG
+                         fix bug in interlaced PNG with user-specified channel count
+
+   See end of file for full revision history.
+
+
+ ============================    Contributors    =========================
+
+ Image formats                          Extensions, features
+    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
+    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
+    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
+    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
+    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
+    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
+    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
+    urraka@github (animated gif)           Junggon Kim (PNM comments)
+                                           Daniel Gibson (16-bit TGA)
+
+ Optimizations & bugfixes
+    Fabian "ryg" Giesen
+    Arseny Kapoulkine
+
+ Bug & warning fixes
+    Marc LeBlanc            David Woo          Guillaume George   Martins Mozeiko
+    Christpher Lloyd        Martin Golini      Jerry Jansson      Joseph Thomson
+    Dave Moore              Roy Eltham         Hayaki Saito       Phil Jordan
+    Won Chun                Luke Graham        Johan Duparc       Nathan Reed
+    the Horde3D community   Thomas Ruf         Ronny Chevalier    Nick Verigakis
+    Janez Zemva             John Bartholomew   Michal Cichon      svdijk@github
+    Jonathan Blow           Ken Hamada         Tero Hanninen      Baldur Karlsson
+    Laurent Gomila          Cort Stratton      Sergio Gonzalez    romigrou@github
+    Aruelien Pocheville     Thibault Reuille   Cass Everitt
+    Ryamond Barbiero        Paul Du Bois       Engin Manap
+    Blazej Dariusz Roszkowski
+    Michaelangel007@github
+
+
+LICENSE
+
+This software is in the public domain. Where that dedication is not
+recognized, you are granted a perpetual, irrevocable license to copy,
+distribute, and modify this file as you see fit.
+
+*/
+
 // Modified by Lasse Oorni and Yao Wei Tjong for Urho3D
 
 #ifndef STBI_INCLUDE_STB_IMAGE_H