Add minion_type grain to unbootstrapped minions

Fixes: #26 (closed)

docs/source/topics/salt_minion.rst

+Heist Minion
+============
+
+There are two ways to differentiate between a Heist-Salt minion
+and a regular minion. A Heist-Salt minion communicates with the
+master over SSH. Also, a Heist-Salt minion includes a `minion_type: heist`
+grain. If you want to target only heist minions you can with
+grains targeting on a Salt Master.
+
+
+.. code-block:: bash
+
+    salt -G 'minion_type:heist' test.version
+
+
+Since Heist-Salt minions communicate over SSH if your Salt Master is attempting
+to check for connected minions it will not work by default for Heist Minions. You
+will need to set `detect_remote_minions` to be True in your Salt Master configuration.
+This will check for connections the Master is connected to over port 22
+by default. If you are running SSH on a different port you can change the
+port with `remote_minions_port`. These settings will allow presence events, the
+manage runner and any other features that detect connected minions in to a Salt Master
+to work properly.