v0.7.2 RancherOS

- 1453: Root access to installed RancherOS without password

Lets build v0.8.0-rc1

dealing with DirtyCow

Merge pull request rancher#1325 from ibuildthecloud/kernel

Kernel Ubuntu-4.4.0-42.62-rancher1-1

Merge pull request rancher#1325 from ibuildthecloud/kernel

Kernel Ubuntu-4.4.0-42.62-rancher1-1

Merge pull request rancher#1325 from ibuildthecloud/kernel

Kernel Ubuntu-4.4.0-42.62-rancher1-1

Merge pull request rancher#1322 from ibuildthecloud/new-kernel2

kernel v4.4.24-rancher1

Merge pull request rancher#1263 from deitch/efi-live-boot-support

Add EFI live boot support

Merge pull request rancher#1299 from joshwget/remove-read-only-mounts

Remove read-only mounts from cloud-init-execute

Merge pull request rancher#1269 from joshwget/packet-phone-home

Post to Packet phone home URL on first boot