Fixed bug that caused '/-' to be appended to object name for streaming uploads. More logging and content type handling cleanup.
Fixed bug that caused '/-' to be appended to object name for streaming uploads. More logging and content type handling cleanup.


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