Initial add of dummy saltify settings

This commit also provides a more concrete example of a 'host' to
be saltified.  Users can do

    salt-cloud -p make_salty someinstance

or

    salt-cloud -m /etc/salt/cloud.maps.d/foo.conf

Either which way the online docs should really be updated with more
concrete examples.

salt/files/cloud.maps.d/saltify.conf

+# This file is managed by Salt via {{ source }}
+make_salty:
+  - someinstance:
+      ssh_host: somehost.somedomain
+      ssh_username: user
+      password: password
+      sudo: True

salt/files/cloud.profiles.d/saltify.conf

+# This file is managed by Salt via {{ source }}
+make_salty:
+  provider: saltify

salt/files/cloud.providers.d/saltify.conf

+# This file is managed by Salt via {{ source }}
+saltify:
+  provider: saltify