Update README.md for readability and typo fixes

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)

storage/bigquery/README.md

@@ -9,16 +9,21 @@ To run the current version, following flags need to be specified:
 ```
  # Storage driver to use.
  -storage_driver=bigquery
+ 
  # Information about server-to-server Oauth token.
  # These can be obtained by creating a Service Account client id under `Google Developer API`
+ 
  # service client id
  -bq_id="XYZ.apps.googleusercontent.com"
+ 
  # service email address
  -bq_account="ABC@developer.gserviceaccount.com"
+ 
  # path to pem key (converted from p12 file)
  -bq_credentials_file="/path/to/key.pem"
+ 
  # project id to use for storing datasets.
  -bq_project_id="awesome_project"
 ```
 
-See Service account Authentication](https://developers.google.com/accounts/docs/OAuth2) for Oauth related details.
+See [Service account Authentication](https://developers.google.com/accounts/docs/OAuth2) for Oauth related details.