Revert "Update escpos-php"

htdocs/includes/mike42/escpos-php/.gitignore

htdocs/includes/mike42/escpos-php/.travis.yml

htdocs/includes/mike42/escpos-php/Escpos.php

htdocs/includes/mike42/escpos-php/README.md

htdocs/includes/mike42/escpos-php/autoload.php

htdocs/includes/mike42/escpos-php/composer.json

htdocs/includes/mike42/escpos-php/example/README.md

htdocs/includes/mike42/escpos-php/example/barcode.php

htdocs/includes/mike42/escpos-php/example/bit-image.php

...42/escpos-php/example/character-encodings-with-images.php

...ncludes/mike42/escpos-php/example/character-encodings.php

...s/includes/mike42/escpos-php/example/character-tables.php

htdocs/includes/mike42/escpos-php/example/demo.php

htdocs/includes/mike42/escpos-php/example/graphics.php

...cs/includes/mike42/escpos-php/example/interface/README.md

...includes/mike42/escpos-php/example/interface/ethernet.php

...ncludes/mike42/escpos-php/example/interface/linux-usb.php

htdocs/includes/mike42/escpos-php/example/interface/smb.php

...ludes/mike42/escpos-php/example/interface/windows-lpt.php

...ludes/mike42/escpos-php/example/interface/windows-usb.php