Changes and fixes

• Python 3.5 is not longer supported
• Internal refactoring of the client library to requests dependency instead of urllib3
• Fixing hanging long running requests using TCPKeepAliveAdapter (add requests_toolbelt dependency)
• Fixing table links in docs

Additions

• Add revisions_rebuild for deployments
• Add credit_rate to instance types
• Add timeout to deployment request response,
• Add pipeline_timeout and deployment_timeout to pipeline request response
• Add pipeline_requests to pipeline request response for allowing sub-pipeline results
• Add _progress_bar to file upload and download functions (add tqdm dependency)
• Add stream_logs to wait-for functions