Add a module to add ssh public keys to all of the nodes

This assumes that you have an ssh rsa public key...
update inventory and all vars to be more generic and readable
Add an etcd role, so setting up at etcd cluster can be easy
get the minion ips from the inventory, not from the variables
get the apiserver ip from the inventory, not some other config
Get etcd server from inventory, not from config file
update the readme since the config changed slightly
Open the firewalld port imediately as well as setting it for the next reboot

doing it 'immediately' means putting permanent=false.  We were
previously just updating the saved ruleset, but not the running ruleset.
track the inventory and the variables.  add a place for local inventory
Add info about bootstrapping ssh keys, when they are not in known_hosts
push the public key to the ansible_ssh_user, not always root
HORRIFIC: ignore the gpg_key on the yum repos since we don't sign f21
HORRIFIC_HACK: ignore all errors when running the copr enable

we know the copr pythong module is broken, but it still lays down the
repo like we need.  so just ignore the error
Start docker on the minion!!