Add examples to backup create command

Signed-off-by: Nolan Brubaker <brubakern@vmware.com>

pkg/cmd/cli/backup/create.go

@@ -46,6 +46,20 @@ func NewCreateCommand(f client.Factory, use string) *cobra.Command {
 			cmd.CheckError(o.Validate(c, args, f))
 			cmd.CheckError(o.Run(c, f))
 		},
+		Example: `	# create a backup containing all resources
+	velero backup create backup1
+
+	# create a backup including only the nginx namespace
+	velero backup create nginx-backup --include-namespaces nginx
+
+	# create a backup excluding the velero and default namespaces
+	velero backup create backup2 --exclude-namespaces velero,default
+
+	# view the YAML for a backup that doesn't snapshot volumes, without sending it to the server
+	velero backup create backup3 --snapshot-volumes=false -o yaml
+	
+	# wait for a backup to complete before returning from the command
+	velero backup create backup4 --wait`,
 	}
 
 	o.BindFlags(c.Flags())