…1067)

…1071)

* Link to Contributor Guide from README. Expand Maintainer Guide with more details on virtual env setup. Mirror Maintainer Guide steps as closely to CI execution as possible. (#1070)
* Remove env var prefixing from test run command

Fix the wrong column data size for bot_token in the built-in SQLAlchemy data model

The API methods themselves are inconsistent about the spelling of
ratelimited vs rate_limited. chat.postMessage spells it
rate_limited. The API docs on rate limiting itself suggest using the
HTTP status code.

This updates the examples in the doc to use the status_code member of
Response objects, instead of looking in the returned JSON.

Closes #1073

* Fix #1078 Add Sign in with Slack (OpenID Connect) support

* Remove unused files

…#1081)