Update to 1.12.1

Update AUFS to v4.4-20160815

Update AUFS to v4.4-20160815

Update Docker to 1.12.0

Merge pull request boot2docker#1179 from kjkunte/patch-1

Update kernel_config

Update kernel to 4.4.15

Merge pull request boot2docker#1174 from tianon/userns

Adjust to allow "--userns-remap=default" to work out-of-the-box

Update VBox tools to 5.0.22

Update kernel to 4.4.13 (and AUFS to v4.4-20160613)

Update to 1.11.2