Changed logging to print "Copying..." and Content-Type on same line; refactored content type and log handling.
Changed logging to print "Copying..." and Content-Type on same line; refactored content type and log handling.


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