How to save custom binary files to iCloud?

As a simple programmer I don't have much knowledge about saving files for mobile but now that my game is almost ready I need to learn more about this.
1.Does Unity provide plugins to make saving data to iOS and iCloud possible?
2. What are the steps to take after I created my binary files to 'send' it to the iCloud?
3. Will I not run in trouble when there are different versions on the iCloud stored then on the device?
4. Does Unity provides a tutorial and how to prevent or handle these kind of situation?