* Fixes NPE when no outputDir is set
* Fix behaviors of default values for values not provided by user
* Easier handling of default behavior in settings.
* Fixes for dynamic config deserialization (specifically, ruby client sample fix)
* Tests for WorkflowSettings (defaults, modified defaults, nulls)
* Test modification of WorkflowSettings defaults for both class constructor and builder
* add multiple server support to python client
* various fixes
* minor fixes, add tests
* test oas2 python first
* fix tests
* fix issues reported by flake8
* update code format
* add python petstore to ensure up-to-date
* rearrange test
* fix E501
* fix tests
* add new files
* fix script permission
* fix index check
* update samples
