This is a basic port/copy of the JavaScript CRC implementation.
The following functions are exported:
crc8(String) #=> Number
crcArc(String) #=> Number
crc16(String) #=> Number
fcs16(String) #=> Number
crc32(String) #=> Number
hex8(Number) #=> String
hex16(Number) #=> String
hex32(Number) #=> String
npm install crc