Initial version, support most common POS printer

Supported printers:

Bematech MP-5100 TH
Bematech MP-4200 TH
Bematech MP-20 MI
Bematech MP-100S TH
Epson TM-T20
Epson TM-T81
Epson TM-T88
Elgin NIX
Elgin VOX+
Elgin VOX
Elgin I9
Elgin I7
Daruma DS300
Daruma DS348
Daruma DR600
Daruma DR700
Daruma DR800
Diebold IM113
Diebold IM402
Diebold IM433
Diebold IM453
Diebold Mecaf Perfecta (IM833)
Diebold TSP-143
PertoPrinter
Citizen CMP-20