Release 2.0.0

• Every feature anyone has ever requested, except for a GUI :)
• Several new inventory commands giving the ability to manipulate inventory contents.
  Add, move, swap, or delete inventory items
• New command maxslots. Maximizes the number of inventory slots. Instant 48-slot ship!
• New command: info. This can be used to dump information about the most recent game save, including
  the player's position and inventory contents.
• New command: backup. This command allows the user to back-up the current game save without modifying it.
• New command: restore. This command is functionally equivalent to 'restore', but was provided to
• Backup now also writes a decrypted, formatted JSON file. This makes it easy to
  restore a backup by simply using the encrypt command with one of these JSON files as input.
• Backup now includes the game mode in the output file name.
• Backup now by default only makes a copy of the unencrypted JSON file rather than the full
  archive of the save dir. A full archive is still available with the --full-backup option.
  make the process of restoring a backed-up game-save more explicit/obvious to the end user.
• Significant internal refactoring to separate the command-line interface from the save-game abstraction.
  This will allow that code to be used in other contexts (like a GUI).
• Support for the old NMS version 1.0 save-game format has been removed.
• The command-line options have changed. Please check the help for details.