(WIP) Rust client for Apache IotDB

Example

```rust use thrift::Error;

use iotdb::client::Client; use iotdb::pretty; use iotdb::session::Session; use std::collections::HashMap;

fn main() -> Result<(), Error> { // create client 4 ways // let client = Client::new("localhost", "6667").create(); // let client = Client::new("localhost", "6667").enablerpccompaction().create(); // let client = Client::default().enablerpccompaction().create()?; let client = Client::default().create()?;

// open a session
let mut session = Session::new(client);

// config session
let mut config_map = HashMap::new();
config_map.insert("", "");

// session
//     .user("root")
//     .password("root")
//     .fetch_size(2048)
//     .zone_id("UTC+8")
//     .config("", "")
//     .config_map(config_map)
//     .open()?;

// using default config
session.open()?;

let res = session.query("SHOW TIMESERIES root")?;
println!("{:#?}", res);
pretty::result_set(res);

session.close()?;

Ok(())

}

```