Merge pull request 'update readme' (#4) from ьфыеук into master

Reviewed-on: #4

README_EN.md

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+# Localizations
+EN | [RU](https://git.amok.dev/AmokDev/rust-discord-rpc/src/branch/master/README.md)
+
+# Rust Discord Activity
+_A lightweight Rust library to control Discord Rich Presence for Windows, Linux and MacOS_
+
+[Author of the idea](https://github.com/DylanCa/rust-discord-activity)
+
+## Installation
+```bash
+cargo add --git https://git.amok.dev/AmokDev/rust-discord-rpc
+```
+
+## How to use
+1. Instantiate a new DiscordClient
+2. Create your Activity and set desired data using provided structs 
+3. Create a new Payload with your Activity 
+4. Send your Payload through the DiscordClient
+
+## Example
+```rust
+let mut client = DiscordClient::new("<application_id>");
+
+let _ = client.connect();
+
+let limg = Some(String::from("https://placehold.co/600x400/png"));
+let simg = Some(String::from("https://placehold.co/200x100/png"));
+let asset = Asset::new(limg, None, simg, None);
+let now_in_millis = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_millis();
+let timestamp = Timestamp::new(Some(now_in_millis - 10000), None);
+
+let party = Party::new(None, Some((2, 4)));
+let mut button_vec = vec![];
+button_vec.push(Button::new("First Button".into(), "https://google.com".into()));
+button_vec.push(Button::new("Second Button".into(), "https://yahoo.com".into()));
+
+let mut activity = Activity::new();
+
+activity
+    .set_state(Some("This is State".into()))
+    .set_activity_type(Some(ActivityType::LISTENING))
+    .set_details(Some("This is Details".parse().unwrap()))
+    .set_timestamps(Some(timestamp))
+    .set_assets(Some(asset))
+    .set_party(Some(party))
+    .set_instance(Some(true))
+    .set_buttons(Some(button_vec));
+
+let payload = Payload::new(EventName::Activity, EventData::Activity(activity));
+
+let _ = client.send_payload(payload);
+
+```
+
+This sets-up a new Activity for the current Discord user:
+
+<img alt="Discord Rich Presence" src="https://imgur.com/gf9pOen.png" width="300"/>
+
+# Thanks for support
+## Testers
+|    Windows    |    MacOS    |  Linux   |
+|---------------|-------------|----------|
+|  AmokDev (me) |   hellkarm  | doxbiner |