Fixed command line app checksum bug (ignored CR in binary input!)

src/serial.c

     }
 
     // Input Modes
-    options.c_iflag |= IGNCR; // Ignore CR
 #ifdef XONXOFF
     options.c_iflag |= IXON; // XON-XOFF Flow Control
 #endif
     options.c_cflag |= CREAD; // Enable Receiver
     options.c_cflag |= CLOCAL; // Ignore modem status lines
 
-    // Local Modes
-    options.c_lflag |= IEXTEN; // Extended input character processing
-
     // Special characters
     options.c_cc[VMIN] = 0; // Always return...
     options.c_cc[VTIME] = 0; // ..immediately from read()