Changelog 0.16.0

Signed-off-by: Joffrey F <joffrey@docker.com>

CHANGELOG.md

 # Changelog
 
+# 0.16.0 (2018-08-11)
+
+### General
+
+- The default storage driver has been updated to `overlay2` for several systems
+- Improved error reporting for the `ssh` subcommand when using the `--native-ssh` flag
+
+### Drivers
+
+**amazonec2**
+
+- Improved handling of VPC errors
+
+**openstack**
+
+- Machine removal no longer fails upon attempting to delete a non-existing keypair
+
 # 0.15.0 (2018-06-12)
 
 ## General