Add release notes

RELEASE.md

@@ -1,12 +1,34 @@
 # Release notes
 
-## unrelease
+## v0.0.2
+
+This release contains some changes that forces applications that use
+TKey-libs to be updated to work with this release.
+
+Breaking changes:
+- Introducing include hierarchy to make it less generic, e.g.,
+  `#include <tkey/led.h>`.
+- Use stdint.h/stddef.h infavor of types.h.
+- Library .a files built on top level to simplify inclusion.
+- Upgraded Monocypher to 4.0.1.
+- QEMU debug behaviour changed, instead of defining `NODEBUG` to
+  disable debug, one has to enable it by defining `QEMU_DEBUG`.
+
+Changes:
+- Introduce functions to control the LED, led.h and led.c.
+- New function, assert() to make an illegal instruction and forcing
+  the CPU to halt.
+- Add functions memcpy_s(), wordcpy_s(), memeq() from firmware
+- Adding `const` to MMIO variables and qemu_* functions.
+- Minor tweaks, clean up and bugfixes.
+
+Full changelog:
+[v0.0.1...v0.0.2](https://github.com/tillitis/tkey-libs/compare/v0.0.1...v0.0.2)
 
-Upgraded Monocypher to 4.0.1.
 
 ## v0.0.1
 
-Just ripped from 
+Just ripped from
 
 https://github.com/tillitis/tillitis-key1-apps