Cumulusci

* Make robot commands use new lightning URLs
* Remove unused filter_name arg from Go to Record Home robot keyword.
* Fix metadata map for Settings.

* Flows that are executed from within another flow now support task-level control flow.
* We no longer support the undocumented ability for a Flow to provide its own class_path.
* Use the connected app details to set a client name on HTTP requests to Salesforce.

* `cci service show` has been renamed `cci service info`!
* Update default API version in the base YAML to v43.0.
* Doc updates in the tutorial, thanks to justindonnaruma!
* Significant refactor of the cli module, including a bunch of small usability and exception handling changes. See https://github.com/SalesforceFoundation/CumulusCI/pull/708 for details.
* Display the file name for error causing files in more cases.
* Strip packageVersions tags from aura/, components/, and pages/ metadata.
* Update PyYAML dependency.

* In Robot tests that use the standard keyword for interacting with a lookup field, we now wait for all AJAX requests to complete before submitting.
* Add unit tests for large sections of the library.
* We now support Flow, DuplicateRule, and other new Metadata types thanks to carlosvl.
* Fixed refreshing oauth token when deploying metadata to persistent orgs.

* Fixes 695: Fix an issue deploying packages.

This release fixes issues with interacting with scratch orgs on Windows and a bug that caused the sfdx alias for created scratch orgs to include double quotes.

* Fixes 611
* Fixes 664