update CHANGELOG

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

CHANGELOG

+=========
 Changelog
 =========
 
+[1.0.0] - 2019-09-26
+====================
+
+Changes
+-------
+- better ``printk()`` output
+- better use of ``memcpy()``
+
 [0.9.1] - 2019-09-09
---------------------
+====================
 
 Added
-~~~~~
+-----
 
 - First stable implementation of FMC framework