Merge pull request #157 from saltstack-formulas/lookup-fix-3

(Re-)enable pillar users-formula:lookup

README.rst

 ---------------
 
 Permits the abitrary management of files. See pillar.example for configuration details.
+
+Overriding default values
+=========================
+
+In order to separate actual user account definitions from configuration the pillar ``users-formula`` was introduced:
+
+.. code-block:: yaml
+
+    users:
+      myuser:
+        # stuff
+
+    users-formula:
+      lookup:
+        root_group: toor
+        shell: '/bin/zsh'

pillar.example

+users-formula:
+  lookup:  # override the defauls in map.jinja
+    root_group: root
+
 users:
   ## Minimal required pillar values
   auser:

users/map.jinja

     'sudo_package': 'sudo',
     'googleauth_package': 'libpam-google-authenticator',
   },
-}, merge=salt['pillar.get']('users:lookup')) %}
+}, merge=salt['pillar.get']('users-formula:lookup')) %}