v1.2.0

Added

• Operator Name to labels
• Label print history

Changed

• Improved inverse generation
• Improved error feedback in the server, and bat file
• Improved README

Fixed

• Program now waits for printing to finish before returning success to client
• If barcode start and end are swapped, the program will now swap them back
• Barcode start and end can now be 0 (or negative I guess)
• Inverse labels are now generated correctly, even with complex layouts
• Generate enough leaders to fill a row