Document supported SDL2 versions
Mention the bundled feature as well
@@ -32,7 +32,9 @@ We currently target the latest stable release of Rust.
## *SDL2.0 development libraries*
-### "Bundled"
+SDL2 >= 2.0.5 is recommended to use these bindings, but note that SDL2 >= 2.0.4 is also supported. Below 2.0.4, you may experience link-time errors as some functions are used here but are not defined in SDL2. If you experience this issue because you are on a LTS machine (for instance, Ubuntu 12.04 or Ubuntu 14.04), we definitely recommend you to use the feature "bundled" which will compile the lastest stable version of SDL2 for your project.
+
+### "Bundled" Feature
Since 0.31, this crate supports a feature named "bundled" which downloads SDL2 from source, compiles it and links it automatically. While this should work for any architecture, you **will** need a C compiler (like `gcc`, `clang`, or MS's own compiler) to use this feature properly.
