Add Rust usage note to SDK Usage (#72)

SDK_USAGE.md

@@ -6,8 +6,18 @@ If you wish to use the SDK, you should be dynamically linking to the `wooting-an
 
 To get started, make sure you have the SDK & Wooting plugin installed. Follow the installation instructions from the [SDK Readme](https://github.com/WootingKb/wooting-analog-sdk).
 
+### C/C++
+
 Then download & extract the `.tar.gz` for the platform you’re targeting from the [latest release](https://github.com/WootingKb/wooting-analog-sdk/releases). Inside the `$extract/wrapper` directory you’ll find the wrapper lib you should link to and all the headers you may need.
 
+### Rust
+
+Add the following to your crate's dependencies:
+
+```TOML
+wooting-analog-wrapper = { git = "https://github.com/WootingKb/wooting-analog-sdk" }
+```
+
 ## Keycodes
 
 By default the SDK will use the [USB HID codes (see table 10.6)](https://www.win.tue.nl/~aeb/linux/kbd/scancodes-10.html#scancodesets) to identify keys. This can be changed using the [Set Keycode Mode](#set-keycode-mode) function, which changes the keycodes taken by `read_analog` and the keycodes given in `read_full_buffer`. The available options are: