cloud/bigquery: New package.
cloud/bigquery: New package.

Change-Id: I2ecce895a04758cc5464ef4f2bc0240394e0fe10

googleapis/google-cloud-go,michael-grosshans/google-cloud-go,hsinhoyeh/gcloud-golang,roth1002/gcloud-golang,hsinhoyeh/gcloud-golang,ptomasroos/gcloud-golang,michael-grosshans/google-cloud-go,googleapis/google-cloud-go,blowmage/gcloud-golang,ptomasroos/gcloud-golang,blowmage/gcloud-golang,Maksadbek/gcloud-golang,googleapis/google-cloud-go,googleapis/google-cloud-go,Maksadbek/gcloud-golang,roth1002/gcloud-golang