add credits to readme

README.md

@@ -5,6 +5,10 @@ stb
 
 single-file public domain libraries for C/C++ <a name="stb_libs"></a>
 
+Most libraries by stb, except: stb_dxt by Fabian "ryg" Giesen, stb_image_resize
+by Jorge L. "VinoBS" Rodriguez, and stb_sprintf by Jeff Roberts.
+
+
 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_sprintf.h

@@ -5,8 +5,6 @@
 // allowed types:  sc uidBboXx p AaGgEef n
 // lengths      :  h ll j z t I64 I32 I
 
-
-
 #ifndef STB_SPRINTF_H_INCLUDE
 #define STB_SPRINTF_H_INCLUDE
 

tools/README.header.md

@@ -3,5 +3,9 @@ stb
 
 single-file public domain libraries for C/C++ <a name="stb_libs"></a>
 
+Most libraries by stb, except: stb_dxt by Fabian "ryg" Giesen, stb_image_resize
+by Jorge L. "VinoBS" Rodriguez, and stb_sprintf by Jeff Roberts.
+
+
 library    | lastest version | category | LoC | description
 --------------------- | ---- | -------- | --- | --------------------------------