Pyqthotkey

- Ported to qtpy
- Uploaded to PyPI
- Added and renamed multiple methods
- Refactored code
- Fixed wrong name for Key_Space
- Added tests

- Change methods to camel case to reflect PyQt standards
- Add data type definitions for method arguments and return values
- Update README with more customization examples
- Fix window dragging bug for the custom styling example

- Add missing getters and setters

Initial release