Roadmap to 1.0

[retrixe]

• Revamp the user interface.
• Unmount devices before writing to them (see if reserving them is possible).
• Add validation for written images.
• Prevent writing to devices if source ISO > destination device.
• Create a proper README.
• Write unit tests for every function.
• E2E test on last 2 versions of:
  • macOS
  • Ubuntu LTS
  • Kubuntu LTS
  • Lubuntu LTS
  • Xubuntu LTS
  • Ubuntu Budgie LTS
  • Ubuntu MATE LTS
  • Ubuntu Cinnamon LTS
  • Debian
  • Fedora Workstation
  • Fedora KDE Plasma Desktop
  • openSUSE Leap

Windows support will likely not be completed in time for 1.0 and will most likely be completed in 1.1 instead, but the basics are already there in any case.