Trayifier

- Trayify has been renamed to Trayifier because Trayify was already taken on PyPI.
- Trayify will now extract an executable's icon to use in the tray.
- Trayify will now check whether the trayified process is still running, and quit if it is not.
- Trayify can now be imported by other python scripts and trayify processes from within other scripts.
- Updated to python 3.10, and some minor improvements have been made.
- Trayifier will be added to PyPI!

Hopefully worked around a bug that caused issues when setting the active window.

The windows will now be put into focus when being toggled, and if the trayified application has already terminated when Trayify closes, there will not be an error any more.

Initial release. Tested on Python 3.7.