Docs are missing information.

[tswast]

Compare http://googlecloudplatform.github.io/gcloud-python/0.17.0/bigquery-client.html and http://googlecloudplatform.github.io/gcloud-python/#/docs/master/gcloud/bigquery/client/client

There is a ton of information missing now. For example, I don't see any information about what parameters the constructor takes.

Also, the links to the "Using the API" pages have completely disappeared.

[tswast]

Closing this as a duplicate of #2037.