Updated instructions on creating a bucket
Updated instructions on creating a bucket

Moved the instructions on creating a Cloud Storage bucket
above the instructions for building the jar file because
we stage the built jar file to the bucket. So it needs to
be created beforehand.

GoogleCloudPlatform/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,nlpraveennl/cloud-bigtable-examples,GoogleCloudPlatform/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,GoogleCloudPlatform/cloud-bigtable-examples,GoogleCloudPlatform/cloud-bigtable-examples,nlpraveennl/cloud-bigtable-examples,nlpraveennl/cloud-bigtable-examples,nlpraveennl/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,sduskis/cloud-bigtable-examples,sduskis/cloud-bigtable-examples