Add helper scripts to CLI client

client-cli/scripts/README

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+# PVC helper scripts
+
+These helper scripts are included with the PVC client to aid administrators in some meta-functions.
+
+The following scripts are provided for use:
+
+## `migrate_vm`
+
+Migrates a VM, with downtime, from one PVC cluster to another.
+
+`migrate_vm <vm> <source_cluster> <destination_cluster>`
+
+### Arguments
+
+ * `vm`: The virtual machine to migrate
+ * `source_cluster`: The source PVC cluster; must be a valid cluster to the local PVC client
+ * `destination_cluster`: The destination PVC cluster; must be a valid cluster to the local PVC client
+
+## `import_vm`
+
+Imports a VM from another platform into a PVC cluster.
+
+## `export_vm`
+
+Exports a (stopped) VM from a PVC cluster to another platform.
+
+`export_vm <vm> <source_cluster>`
+
+### Arguments
+
+ * `vm`: The virtual machine to migrate
+ * `source_cluster`: The source PVC cluster; must be a valid cluster to the local PVC client