v1.5

Highlights of this release:

New device profiles included from receipt-print-hq/escpos-printer-db:

• Aures OCD-300 customer display (use AuresCustomerDisplay class)
• ZJ-5890

New connector:

• ApiPrintConnector, implementing connectivity to instances of ablunier/escpos-print-api.

Build and documentation fixes:

• PHP 7.1 support
• Code coverage now included in build
• FAQ updates
• New developer guide

Bug fixes:

• WindowsPrintConnector failed to print when LPT1 connection is used - #277

Tested on new devices:

• Star TSP100 ECO
• Metapace T-1
• Excelvan HOP-E200
• Epson TM-T88V