Add Discord SDK (#65)

.gitignore

@@ -0,0 +1,2 @@
+.idea
+.DS_Store

README.md

@@ -28,6 +28,7 @@ Name | Description | Crates.io
 ❌ [`cargo-deny`](https://github.com/EmbarkStudios/cargo-deny) | Cargo plugin to help you manage large dependency graphs | [![Latest version](https://img.shields.io/crates/v/cargo-deny.svg)](https://crates.io/crates/cargo-deny)
 🎁 [`cargo-fetcher`](https://github.com/EmbarkStudios/cargo-fetcher) | `cargo fetch` alternative for use in CI or other "clean" environments | [![Latest version](https://img.shields.io/crates/v/cargo-fetcher.svg)](https://crates.io/crates/cargo-fetcher)
 ⚙️ [`cfg-expr`](https://github.com/EmbarkStudios/cfg-expr) | A parser and evaluator for Rust `cfg()` expressions | [![Latest version](https://img.shields.io/crates/v/cfg-expr.svg)](https://crates.io/crates/cfg-expr)
+⛴️ [`discord-sdk`](https://github.com/EmbarkStudios/discord-sdk) | An open implementation of the Discord Game SDK in Rust | 
 🚙 [`gsutil`](https://github.com/EmbarkStudios/gsutil) | A small, incomplete replacement for the official gsutil | [![Latest version](https://img.shields.io/crates/v/gsutil.svg)](https://crates.io/crates/gsutil)
 📦 [`krates`](https://github.com/EmbarkStudios/krates) | Creates graphs of crates from cargo metadata | [![Latest version](https://img.shields.io/crates/v/krates.svg)](https://crates.io/crates/krates)
 🆙 [`octobors`](https://github.com/EmbarkStudios/octobors) | GitHub action for automerging PRs based on a few rules