slightly alter docs for bare metal installation
feat(ec2,rax,gce): mounting storage instructions
fix(ec2,rax,gce): include platform specific instructions
fix(mounting-storage): improve cross-linking
alter mount instructions to use btrfs' subvolumes
Merge pull request #140 from wwaites/master

slightly alter docs for ssh keys on bare metal installation
feat(docs/docker): add examples for debug, remote api socket and modifying flags"
Merge pull request #138 from robszumski/docker-cloudconfig

feat(docs/docker): add cloud-config example for remote api
Merge pull request #141 from robszumski/master

feat(ec2,rax,gce): mounting storage instructions
fix(docs): mention that virtualbox is required and update cloud-config example
fix(pxe/ipxe): clarify update details
fix(using-coreos/gce): updated metadata is applied after reboot
Merge pull request #145 from robszumski/gce_metadata_update

fix(using-coreos/gce): updated metadata is applied after reboot
Added documentation to VirtualBox platform

Added document to run CoreOS on Oracle VirtualBox platform.