Improve readme for nRF example

PUBLISHED_FROM=7b02f8e7bb85ce1b45f872610645e619de5e313a

examples/nRF52/README.md

+# nRF52 example project
+
 This is a Mongoose "Hello, world" that can be compiled under nRF IoT SDK.
 
-To make it work, you should download [nRF5 IoT SDK](http://developer.nordicsemi.com/nRF5_IoT_SDK/) and unpack it in current directory as `nrf5_iot_sdk`.
+To make it work, you should download [nRF5 IoT SDK](http://developer.nordicsemi.com/nRF5_IoT_SDK/)
+and unpack it in the current directory as `nrf5_iot_sdk`.
+
+The project structure replicates that of the examples provided with the SDK:
+Keil uVision project is located at `boards/pca10040/arm5_no_packs`; ARM-GCC
+Makefile is located in `boards/pca10040/armgcc`.