Create readme.md

readme.md

+# Rapidjson v0.1
+
+Copyright (c) 2011-2014 Milo Yip (miloyip@gmail.com)
+
+https://github.com/miloyip/rapidjson/
+
+## Introduction
+
+Rapidjson is a JSON parser and generator for C++. It was inspired by [rapidxml](http://rapidxml.sourceforge.net/)
+
+Rapidjson is small but complete. It supports both SAX and DOM style API. The SAX parser is only a half thousand lines of code.
+
+Rapidjson is fast. Its performance can be comparable to `strlen()`. It also optionally supports SSE2/SSE4.1 for acceleration.
+
+Rapidjson is self-contained. It does not depend on external libraries such as BOOST. It even does not depend on STL.
+
+Rapidjson is memory friendly. Each JSON value occupies exactly 16/20 bytes for most 32/64-bit machines (excluding text string). By default it uses a fast memory allocator, and the parser allocates memory compactly during parsing.
+
+For the full features please refer to the user guide.
+
+JSON(JavaScript Object Notation) is a light-weight data exchange format.
+More information about JSON can be obtained at
+* http://json.org/
+* http://www.ietf.org/rfc/rfc4627.txt
+
+## Installation
+
+Rapidjson is a header-only C++ library. Just copy the rapidjson/include/rapidjson folder to system or project's include path.
+
+To build the tests and examples,
+1. obtain premake4 http://industriousone.com/premake/download
+2. Copy premake4 executable to rapidjson/build
+3. Run rapidjson/build/premake.bat on Windows, rapidjson/build/premake on Linux or other platforms
+4. On Windows, build the solution at rapidjson/build/vs2008/ or /vs2010/
+5. On other platforms, run GNU make at rapidjson/build/gmake/ (e.g., make -f test.make config=release32, make -f example.make config=debug32)
+6. On success, the executable are generated at rapidjson/bin