Solvexia-sdk

- Updated version and usage of the filesplit package
- Updated README.md with information about scopes and the license
- Updated License to GNU General Public License v3.0
- Added support for latest API endpoints to restart a process run from a step and get a step run status
- Updated cancel and start process run methods to use new API endpoints

- Added support for user and usergroup APIs
- Added support of scopes
- Fixed typos and formatting issues in README

- Fix file upload by chunks method to use the right sequence of parameters.

- Added user and user group apis

- Fixed the issue of not being able to upload small file after a large file

- Initial version