Changes

*<code> void WriteByte(byte symbol)</code> For : to transfer a byte without reading the response from the device.*<code> void WriteBuffer(byte[] data, int len)</code> For : to transfer a buffer to the device without processing the response.*<code> void Transfer(byte[] tx_data, byte[] rx_data, int len)</code> For : to transfer a buffer smaller than the length of the receiving one.*<code> void Transfer(byte[] tx_data, byte[] rx_data) </code> For : to transfer and read a buffer with the same length.*<code> void Transfer(byte symbol, byte[] rx_data, int len)</code> For : to transfer a byte and read a buffer of length ''len''.