Added playbooks and scripts

- New mainweb, pxeboot, dns, aethermgmt playbooks
- Add netbox scripts
  - pxeboot information from netbox
  - full configuration for an edge node
- Update timesheets role
- Ignore files directory

Change-Id: Icfc9ce27b92837563ca01102b8a6793020f79b73
diff --git a/playbooks/dns-playbook.yml b/playbooks/dns-playbook.yml
new file mode 100644
index 0000000..33c4c9b
--- /dev/null
+++ b/playbooks/dns-playbook.yml
@@ -0,0 +1,8 @@
+---
+# Ansible playbook to configure a DNS server
+
+- name: Configure a dns server
+  hosts: dns
+  become: true
+  roles:
+    - nsd