Refactoring deploystack around load_image

Also removes unwanted "magic" element detection from deploystack.
Fix deploystack to use full path to loadimage
add automation for building a tripleo setup:

- build and boot a bootstrap node
- do deployments of heat stacks onto 'baremetal' vms.
fix ssh key issue with the cloud-init script:

use default ssh key path of id_rsa.
automation.md discusses running in a cloud vm.
be clear which params are requred in tripleorc.
install python-numpy and python-lxml from bin pkg.
exit with error if user is not in group livirtd.
grab devstack creds, run heat on host.
throw an error if the user hasn't entered settings
snapshot fresh devstack, better logging, squash me.