v2.0.0

• add --dd option to use dd instead of mount + cp
• drop rsync for cp
• add sync call right after copying to guarantee all writes are flushed to USB device before unmounting with progress indicator
• call wipefs before partitionning to cleanup device signature
• eject device after unmounting (can be disabled with --no-eject option)
• checkpkg now called for specific options (you don't need all dependencies installed before running)
• safeguard added to check bash version 4+
• better handling of missing dependencies with separation of command name and package name
• refactoring (better naming)