Merge pull request #473 from luoliwoshang/readme/raylib

[wip] README:raylib

c/raylib/README.md

@@ -0,0 +1,30 @@
+# LLGo wrapper of raylib
+
+## How to install
+
+### on macOS (Homebrew)
+
+```sh
+brew install raylib
+```
+
+### on Linux (Debian/Ubuntu)
+
+```sh
+TODO
+```
+
+## Demos
+
+The `_demo` directory contains our demos (it start with `_` to prevent the `go` command from compiling it):
+
+- [raylibdemo](_demo/tetris/tetris.go): a basic raylib demo
+
+### How to run demos
+
+To run the demos in directory `_demo`:
+
+```sh
+cd <demo-directory>  # eg. cd _demo/tetris
+llgo run .
+```