Fix compilation < R16B01

Update Cowboy to 0.8.5

Update CHANGELOG

Update to 0.8.3

Update to 0.8.2

Update to 0.8.1

Update to 0.8.0

Update version to 0.6.1

Update version to 0.6.0

Also update the CHANGELOG and copyright years.

Update version to 0.4.0