* Initial fix for launch
* Minor fixes
* Succesful launch tests
* More launch test fixes
* Some bit of cleanup
* Fix linter
* More cleanup
* Attach using import
* Fix circular importing
* Support attach via command line
* Backchannel and Other test fixes
* Linter fix
* Python path fix in test
* Fix lint after rebase
* Support exitCode in tests
* More fixes after rebase
* Fix expected exit code
* Remove changes to MessageDict __call__
* Remove hold subprocess event
