More content and playbooks

* more readme.md content
* imported basic roles
* commented said basic roles
* trimmed down playbooks to be understandable
* update requirements.txt deps

roles/ntp/handlers/main.yml

@@ -0,0 +1,8 @@
+---
+# handlers are special tasks that you can invoke when something changes.
+# in this example you want to invoke this restart handler when the
+# configuration of the service changes for example.
+- name: "Restart ntp"
+  service:
+    name: ntp
+    state: restarted