README: add section about installing lohr

README.org

@@ -21,6 +21,22 @@ file at the repo root.
 This is a very destructive process: anything removed from the single source of
 truth is effectively removed from any mirror as well.
 
+** Installing
+
+=lohr= is [[https://crates.io/crates/lohr][published on crates.io]], so you can install it with ~cargo install~:
+
+#+begin_src sh
+$ cargo +nightly install lohr
+#+end_src
+
+We currently require a nightly compiler because [[https://github.com/SergioBenitez/Rocket][Rocket]] needs one to compile (a
+0.5.0 which compiles on stable Rust is in the making, stay tuned!). You can
+install a nightly toolchain with the following command:
+
+#+begin_src sh
+$ rustup install nightly
+#+end_src
+
 ** Setup
 
 *** Quickstart