IoTDB restful API

[Boris Zhu]

Hi,
Several months ago, I use jetty to write HTTP API for IoTDB. But someone
thinks using netty is better, so I decided to use netty to achieve HTTP API
for IoTDB. I suggest we can use the postman to test and write a document
for IoTDB restful API. here is the postman document,
https://documenter.getpostman.com/view/12320024/T1LLDnuj. by the way, the
restful API design isn’t perfect for now.