CheckForByteOrderMark fails to recognize Unicode Little-Endian

[aktzbn]

I think you need add clause

            else if (rawData[start + 1] == 0xfe && rawData[start] == 0xff)
            {
                // Encoding.Unicode (Little-Endian)
                return true;
            }

to CheckForByteOrderMark function.

[khalidsalomao]

@aktzbn sorry for the late reply. Could you submit a PR? thanks