JSON: Add cJSON, simdjson

Fix fffaraz#677
Fix fffaraz#733

Author: myd7349

README.md

@@ -488,6 +488,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 ## JSON
 
 * [Boost.PropertyTree](http://www.boost.org/doc/libs/1_55_0/doc/html/property_tree.html) - A property tree parser/generator that can be used to parse XML/JSON/INI/Info files. [Boost]
+* [cJSON](https://github.com/DaveGamble/cJSON) - Ultralightweight JSON parser in ANSI C. [MIT]
 * [frozen](https://github.com/cesanta/frozen) - JSON parser and generator for C/C++. [GPL & GPL2]
 * [Jansson](https://github.com/akheron/jansson) - C library for encoding, decoding and manipulating JSON data. [MIT]
 * [jbson](https://github.com/chrismanning/jbson) - jbson is a library for building & iterating BSON data, and JSON documents in C++14. [Boost]
@@ -510,6 +511,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [QJson](https://github.com/flavio/qjson) - A qt-based library that maps JSON data to QVariant objects. [LGPL2]
 * [RapidJSON](https://github.com/miloyip/rapidjson) :zap: - A fast JSON parser/generator for C++ with both SAX/DOM style API. [MIT]
 * [sajson](https://github.com/chadaustin/sajson) - Lightweight, extremely high-performance JSON parser for C++11. [MIT]
+* [simdjson](https://github.com/lemire/simdjson) - Extremely fast JSON library that can parse gigabytes of JSON per second. [Apache-2.0]
 * [taoJSON](https://github.com/taocpp/json) - Zero-dependency C++ header-only JSON library. [MIT]
 * [ujson](https://bitbucket.org/awangk/ujson) - µjson is a a small, C++11, UTF-8, JSON library. [MIT]
 * [YAJL](https://github.com/lloyd/yajl) - A fast streaming JSON parsing library in C. [ISC]