update readme

README.md

@@ -6,6 +6,63 @@ Glib-oriented client for [Gemini protocol](https://geminiprotocol.net/)
 > Project in development!
 >
 
+## Install
+
+```
+cargo add ggemini
+```
+
+## Usage
+
+## `client`
+
+
+#### `client::simple_socket_request_async`
+
+High-level API to make async socket request and auto-close connection on complete.
+
+Return [Response](#client::response::Response) on success or [Error](#client::Error) enum on failure.
+
+``` rust
+use glib::{Uri, UriFlags};
+
+match Uri::parse("gemini://geminiprotocol.net/", UriFlags::NONE) {
+    // Begin async request
+    Ok(uri) => ggemini::client::simple_socket_request_async(uri, |response| match response {
+        // Process response
+        Ok(response) => {
+            // Expect success status
+            assert!(match response.header().status() {
+                Some(ggemini::client::response::header::Status::Success) => true,
+                _ => false,
+            })
+        }
+        Err(_) => assert!(false),
+    }),
+    Err(_) => assert!(false),
+}
+```
+
+#### `client::Error`
+
+#### `client::response`
+#### `client::response::Response`
+
+#### `client::response::header`
+#### `client::response::header::meta`
+#### `client::response::header::mime`
+#### `client::response::header::status`
+#### `client::response::header::language`
+#### `client::response::header::charset`
+
+#### `client::response::body`
+
+#### `client::socket`
+#### `client::socket::connection`
+#### `client::socket::connection::input`
+#### `client::socket::connection::input::buffer`
+#### `client::socket::connection::output`
+
 ## Integrations
 
 * [Yoda](https://github.com/YGGverse/Yoda) - Browser for Gemini Protocol