Add ECMA-404, and initial src and test folder

ECMA-404
http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf

File Architecture:
.
├── ECMA-404.pdf
├── LICENSE
├── README.md
├── src
│   ├── JSON2C.c
│   └── JSON2C.h
└── test
    ├── Makefile
    ├── sample.json
    └── test.c
[Test][Util] Implement function to read file and convert to string
[Test][Util] implement function printHexArray for debug

* add debug log to convertFileToString
[Featrue] define JSON value type, and implement function to get json value description

1. object
2. array
3. number
4. string
5. boolean
6. null