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/inventory/host_vars/.gitignore b/inventory/host_vars/.gitignore
new file mode 100644
index 0000000..f038221
--- /dev/null
+++ b/inventory/host_vars/.gitignore
@@ -0,0 +1 @@
+# placeholder to create this directory