Updated streaming scripts. Compiler compatibility for _delay_ms().

- Moved obsolete streaming scripts to folder for reference.

- Added a more complex Python streaming script which uses the serial
buffer as an additional streaming buffer.

- Removed all references to a _delay_ms(variable) to allow for better
porting across different compilers.

motion_control.c

@@ -35,7 +35,7 @@ void mc_dwell(double seconds)
 {
    uint16_t i = floor(seconds);
    st_synchronize();
-   _delay_ms(floor(1000*(seconds-i))); // Delay millisecond remainder
+   delay_ms(floor(1000*(seconds-i))); // Delay millisecond remainder
    while (i > 0) {
      _delay_ms(1000); // Delay one second
      i--;