Release 3.0.0

The first open-source release.

• Simple step-by-step wizard to program your token
• Scan a QR code or enter your key by hand
• Warns you about wrong codes or wrong devices before you write
• Confirm success with current, previous, and next codes
• Clone a token for backups
• Identify tokens and sync their clock
• Adjustable algorithm, interval, and screen timeout
• New Token2 look, app icon, and dark mode support