Update README.md
Fix master documentation link
@@ -17,7 +17,7 @@ If you want a library compatible with earlier versions of SDL, please see
# Documentation
-* [master documentation](http://angrylawyer.github.io/rust-sdl2/sdl2/)
+* [master documentation](http://rust-sdl2.github.io/rust-sdl2/sdl2/)
* [crates.io documentation](https://docs.rs/sdl2/)
# Requirements
