Implment copy with an actual minion-side module such that we can get md5sum's and

onchange events like Puppet's file providers do.

examples/playbook.yml

@@ -1,5 +1,9 @@
 - pattern: '*'
   tasks:
+  - do:
+    - copy a file
+    - copy
+    - [ "/srv/a", "/srv/b" ]
   - do:
     - configure template & module variables
     - setup