Update Cowboy to 1.0.1

Update version to 2.0.0-pre.1

Update Cowboy to 1.0.0

Update Cowboy to 0.10.0

Update Cowboy to 0.9.0

Fix compilation < R16B01

Update Cowboy to 0.8.5

Update CHANGELOG

Update to 0.8.3

Update to 0.8.2