`deploy_script` now accepts dictionaries for `minion_conf` and `master_config` not strings.

Refs saltstack/salt#5849
Refs saltstack/salt-cloud#672
The `ec2` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `cloudstack` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `digital_ocean` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `gogrid` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `ibmsce` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `joyent` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `libcloud_aws` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `linode` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `openstack` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `parallels` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `rackspace` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
The `saltify` driver now uses `dict`s for the `{master,minion}_conf` parameters in `saltcloud.utils.deploy_script`. Refs #672
Remove `{master,minion}_conf_string` and their references. Not needed anymore.
Use the unstable bootstrap script while there no stable release. Fixes #672.
Merge pull request #673 from s0undt3ch/issues/672-handle-grains-file

Properly handle the grains file