* run all script in circleci
* test kotlin clients
* add new files
* undo chanages to circleci script
* update samples
* update bitwise config
* fix typo
* Added new additional parameter to allow nullable api return types
* Tweaking samples and .bat files
I've added new .bat files for the kotlin-client to alllow windows-devs to re-generate required samples via windows-shell (for CI).