v2.0.0

New features:

• New modern look & feel
• More flexible buyer/seller boxes
• Server is decoupled to a separate gem invoice_printer_server
• New bundled fonts in a separate gem invoice_printer_fonts
• Official Docker image
• Prawn 2.2

Deprecations:

• Old provider_ and purchaser_ address fields are replaced with provider_lines and purchaser_lines for better flexibility.