doc(README): Adjust to new command syntax for vagrant box remove
Merge pull request #48 from gmacario/fix-boxremove

doc(README): Adjust to new command syntax for vagrant box remove
fix(clustering): Use same codepath for single- and multi-node
Merge pull request #47 from bcwaldon/fix-usr

Implement clustering with coreos-cloudinit
fix(Vagrantfile): use amd64-usr for vmware
Merge pull request #54 from philips/usr-image-vmware

fix(Vagrantfile): use amd64-usr for vmware