qBittorrent web api for Rust

This is an automatic async implementation of the qBittorrent 4.1 web api. The api generation is based on a forked wiki markdown file describing the api which can be found here and the original here.

Example

```rust use anyhow::Result; use qbittorrentwebapi::Api;

[tokio::main]

async fn main() -> Result<()> { let api = Api::login("http://localhost:8080", "admin", "adminadmin").await?;

// add a torrent
api.torrent_management()
    .add("http://www.legittorrents.info/download.php?id=5cc013e801095be61d768e609e3039da58616fd0&f=Oddepoxy%20-%20Oddepoxy%20(2013)%20[OGG%20320%20CBR].torrent")
    .send()
    .await?;

// critical logs
let logs = api.log()
    .main()
    .critical(true)
    .warning(false)
    .normal(false)
    .info(false)
    .send()
    .await?;

println!("{:#?}", logs);

// current torrent info
let info = api.torrent_management().info().send().await?;

println!("{:#?}", info);

Ok(())

} ```