Changed so auto-update check/prompt aren't made if gsutil -q specified
Changed so auto-update check/prompt aren't made if gsutil -q specified

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