README: Give developers a quickstart in finding dev docs

README.md

@@ -1,4 +1,4 @@
-## PX4 Aerial Middleware and Flight Control Stack ##
+## PX4 Flight Control Stack and Middleware ##
 
 [![Build Status](https://travis-ci.org/PX4/Firmware.svg?branch=master)](https://travis-ci.org/PX4/Firmware)
 
@@ -13,3 +13,21 @@
 *   Binaries (always up-to-date from master):
   * [Downloads](https://pixhawk.org/downloads)
 *   Mailing list: [Google Groups](http://groups.google.com/group/px4users)
+
+### Developers ###
+
+Contributing guide:
+http://px4.io/dev/contributing
+
+Developer guide:
+http://px4.io/dev/
+
+This repository contains code supporting these boards:
+  * PX4FMUv1.x
+  * PX4FMUv2.x
+  * AeroCore
+
+## NuttShell (NSH) ##
+
+NSH usage documentation:
+http://px4.io/users/serial_connection