KNOWN ISSUE: Barrier on windows doesn't appropriately prompt the user to add itself to the firewall, use this guide here!

• remove syntool
• add IPv6 support
• relocate data directories to better conform to platform standards
  • users may need to recreate parts of their configurations. sorry!
• git is no longer required at build-time
• fix clipboard-related crash due to a race condition
• fix main window icon not displaying correctly
• fix exe name not being read correctly at runtime