allow kubectl cmd to process dirs recursively

reqs:
    - the kubectl cmd must support the -f | --filename flag
    - the kubectl cmd must support visiting a dir one level deep,
    or using more than one resource

docs/user-guide/kubectl/kubectl_annotate.md

@@ -89,6 +89,7 @@ kubectl annotate pods foo description-
       --output-version="": Output the formatted object with the given group version (for ex: 'extensions/v1beta1').
       --overwrite[=false]: If true, allow annotations to be overwritten, otherwise reject annotation updates that overwrite existing annotations.
       --record[=false]: Record current kubectl command in the resource annotation.
+  -R, --recursive[=false]: If true, process directory recursively.
       --resource-version="": If non-empty, the annotation update will only succeed if this is the current resource-version for the object. Only valid when specifying a single resource.
   -l, --selector="": Selector (label query) to filter on
   -a, --show-all[=false]: When printing, show all resources (default hide terminated pods.)
@@ -128,7 +129,7 @@ kubectl annotate pods foo description-
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra on 2-Mar-2016
+###### Auto generated by spf13/cobra on 28-Mar-2016
 
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