Fixed bug in copying subdirs to subdirs.
Fixed bug in copying subdirs to subdirs.

dtjackson/gsutil,chriskuehl/gsutil-debian,BrandonY/gsutil,ttiurani/gsutil,craigcitro/gsutil,dimfeld/gsutil,fishjord/gsutil,GoogleCloudPlatform/gsutil,GoogleCloudPlatform/gsutil,mattdr/gsutil