Readme & release notes update

Author: jnaulet

README.md

@@ -1,4 +1,4 @@
-# OpenPicoRTOS [![Latest Release](https://img.shields.io/github/release-date/jnaulet/OpenPicoRTOS)](https://img.shields.io) [![Commits since](https://img.shields.io/github/commits-since/jnaulet/OpenPicoRTOS/latest/v1.5.x)](https://img.shields.io)
+# OpenPicoRTOS [![Latest Release](https://img.shields.io/github/release-date/jnaulet/OpenPicoRTOS)](https://img.shields.io) [![Commits since](https://img.shields.io/github/commits-since/jnaulet/OpenPicoRTOS/latest/v1.6.x)](https://img.shields.io)
 
 Very small, lightning fast, yet portable preemptive RTOS with SMP suppport.
 

RELEASE_NOTES.md

@@ -1,5 +1,14 @@
 # Release notes
 
+## picoRTOS v1.6.0
+### What's new ?
+
+A lot ! picoRTOS now offers a HAL and a bunch of experimental drivers for all
+supported platforms.
+
+Demos have been updated to reflect that and show the power of this new
+code-level HAL.
+
 ## picoRTOS v1.5.4
 ### What's new ?