- DDC status show only errors if any
- added command to get DDC model configuration

- attributes management :
-> integrationTime, buffersize and triggerMode now well initialised

TODO : after a Start command
-> declare all attributes INVALID !?

- Integration Mode available for DDC/SCPI devices
- tests done with a K617 (DDC) and a K6485 (SCPI)

- integration mode OK (tests done with K_486)

- TODO: DDC/SCPI
integration time for ScanServer compatibility.
report config for all DDC
add configuration in SCPI start command

- trigger mode and buffer size management added.
- TODO: DDC/SCPI
integration time for ScanServer compatibility.
SRQ management for Keithley Integration mode