README: split contents into usage & development sections

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/README.md b/README.md
index bc76825..ccc802d 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,22 @@
 This repository contains documentation for OpenBMC as a whole. There may
 be component-specific documentation in the repository for each component.
 
+OpenBMC Usage
+-------------
+
+These documents describe how to use OpenBMC, including using the programmatic
+interfaces to an OpenBMC system.
+
+ - [rest-api.md](rest-api.md): Introduction to using the OpenBMC REST API
+
+ - [console.md](console.md): Using the host console
+
+
+OpenBMC Development
+-------------------
+
+These documents contain details on developing OpenBMC code itself
+
  - [cheatsheet.md](cheatsheet.md): Quick reference for some common
    development tasks
 
@@ -15,7 +31,3 @@
  - [kernel-development.md](kernel-development.md): Reference for common
    kernel development tasks
 
- - [rest-api.md](rest-api.md): Introduction to using the OpenBMC REST
-   API
-
- - [console.md](console.md): Using the host console