Added a setup module which can be used to place key-value JSON data

on the system for use in a later template module.   These values
could also be used for module-specific config.

examples/playbook.yml

@@ -1,5 +1,9 @@
 - pattern: '*'
   tasks:
+  - do:
+    - configure template & module variables
+    - setup
+    - [ "a=2", "b=3", "c=4" ]
   - do:
     - update apache
     - command