docktape 0.3.4

# Docktape
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## Unix Socket initialization
```rust
// Unix socket
let socket = UnixSocket::new("/var/run/docker.sock");

//TCP socket
let socket = TcpSocket::new("http://localhost:2375");
```

## Initialize Docker
```rust
let mut docker = Docker::new(socket.clone());
```

## Make call to Docker API
```rust
match docker.create_image_from_image("fedora:latest", ""){
    Some(msg) =>{
        println!("Error message: {:?}", msg["message"]);
    }
    None =>{
        println!("Image created.");
    }
}

match docker.get_images(){
    Some(images) =>{
        println!("There are {} image(s).", images.len());
    },
    None =>{
        println!("There are no images.");
    }
}

match docker.inspect_image("fedora:latest"){
    Some(img) => {
        println!("Image id: {}.", img.id());
    }
    None => {
        println!("Cannot get image.");
    }
}

...
```