Merge pull request rancher#172 from ibuildthecloud/pr144

Fix Rescue in Grub menu

Merge pull request rancher#167 from dweomer/kernel/4.15.0-62.69-rancher1

bump kernel to 4.15.0-62.69-rancher1

Fix a possible typo in README.md

Fix USB ISO image

Create arm64 isos

Add back efibootmgr

Add keymaps

Fix agent setup

More enhancements to cloud-config

Implement more cloud config