Revert "Learning git... stopped tracking examples directory."

This reverts commit 234683e49c.

Adding examples back.

examples/variable_usage_example.yaml

@@ -0,0 +1,18 @@
+---
+name: Ping Multiple Points
+group: "Kubernetes"
+variables:
+  - name: host1
+    value: "1.1.1.1"
+  - name: host2
+    value: "9.9.9.9"
+  - name: command1
+    value: "ping"
+  - name: cmd_arguments
+    value: "-c 4"
+tasks:
+  - name: Ping host1
+    command: "{{ command1 }} {{ host1 }} {{ cmd_arguments }}"
+
+  - name: Ping host2
+    command: "{{ command1 }} {{ host2 }} {{ cmd_arguments }}"