Simplify version comment in tiny_gltf.h

Remove wuffs code(which was accidently adde to `release` branch)

README.md

@@ -197,6 +197,7 @@ if (!ret) {
 * `TINYGLTF_USE_RAPIDJSON` : Use RapidJSON as a JSON parser/serializer. RapidJSON files are not included in TinyGLTF repo. Please set an include path to RapidJSON if you enable this feature.
 * `TINYGLTF_USE_CPP14` : Use C++14 feature(requires C++14 compiler). This may give better performance than C++11.
 
+
 ## CMake options
 
 You can add tinygltf using `add_subdirectory` feature.

tiny_gltf.h

@@ -25,32 +25,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
-// Version:
-//  - v2.8.1 Missed serialization texture sampler name fixed. PR#399.
-//  - v2.8.0 Add URICallbacks for custom URI handling in Buffer and Image. PR#397.
-//  - v2.7.0 Change WriteImageDataFunction user callback function signature. PR#393.
-//  - v2.6.3 Fix GLB file with empty BIN chunk was not handled. PR#382 and PR#383.
-//  - v2.6.2 Fix out-of-bounds access of accessors. PR#379.
-//  - v2.6.1 Better GLB validation check when loading.
-//  - v2.6.0 Support serializing sparse accessor(Thanks to @fynv).
-//           Disable expanding file path for security(no use of awkward `wordexp` anymore).
-//  - v2.5.0 Add SetPreserveImageChannels() option to load image data as is.
-//  - v2.4.3 Fix null object output when material has all default
-//  parameters.
-//  - v2.4.2 Decode percent-encoded URI.
-//  - v2.4.1 Fix some glTF object class does not have `extensions` and/or
-//  `extras` property.
-//  - v2.4.0 Experimental RapidJSON and C++14 support(Thanks to @jrkoone).
-//  - v2.3.1 Set default value of minFilter and magFilter in Sampler to -1.
-//  - v2.3.0 Modified Material representation according to glTF 2.0 schema
-//           (and introduced TextureInfo class)
-//           Change the behavior of `Value::IsNumber`. It return true either the
-//           value is int or real.
-//  - v2.2.0 Add loading 16bit PNG support. Add Sparse accessor support(Thanks
-//  to @Ybalrid)
-//  - v2.1.0 Add draco compression.
-//  - v2.0.1 Add comparison feature(Thanks to @Selmar).
-//  - v2.0.0 glTF 2.0!.
+// Version: - v2.8.10
+// See https://github.com/syoyo/tinygltf/releases for release history.
 //
 // Tiny glTF loader is using following third party libraries:
 //
@@ -6767,7 +6743,16 @@ void JsonAddMember(detail::json &o, const char *key, detail::json &&value) {
   if (!o.IsObject()) {
     o.SetObject();
   }
-  o.AddMember(detail::json(key, detail::GetAllocator()), std::move(value), detail::GetAllocator());
+
+  // Issue 420.
+  // AddMember may create duplicated key, so use [] API when a key already exists.
+  // https://github.com/Tencent/rapidjson/issues/771#issuecomment-254386863
+  detail::json_const_iterator it;
+  if (detail::FindMember(o, key, it)) {
+    o[key] = std::move(value); // replace
+  } else {
+    o.AddMember(detail::json(key, detail::GetAllocator()), std::move(value), detail::GetAllocator());
+  }
 #else
   o[key] = std::move(value);
 #endif