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

Update to 1.11.1

Switch xe-guest-utilities from explicit commit over to release versio…

…n tag (which is exactly the same commit, but simpler to track)

Update "--strip-components" for 1.11+

Move "docker" back to "/usr/local/bin" for now so we can properly eva…

…luate whether that's a safe change for us to make

Move "docker" back to "/usr/local/bin" for now so we can properly eva…

…luate whether that's a safe change for us to make

Move "docker" back to "/usr/local/bin" for now so we can properly eva…

…luate whether that's a safe change for us to make