Shiny bugs, debugging aids, paging, anti-spam, Google Jupyter support

googleAuthR v0.8.0

• Change behaviour on API parse errors to write a diagnostic object to the working directory
• Add gar_debug_parsing to help debug API parsing errors.
• Fix batching that errored if body was exactly the same
• Set environment args in gar_set_client() to help deployments on Shinyapps.io
• Support API body page requests in gar_api_page()
• Fix gar_set_scopes() to allow multiple scopes when setting with web_json
• Change required scopes in gar_auto_auth to only require one of the scopes specified, instead of all of them
• Fully remove TRAVIS_AUTH
• Remove some message spam from startup
• Fix mocks failing with httptest if used with with_mock_api() vs with_mock_API()
• Add option(googleAuthR.redirect) to help publish Shiny apps to some platforms (#136)
• Add support for using gcloud application-default credentials on Jupyter notebooks via gar_gce_auth_default() (#147)