Release preparation : threaded version (update device for a channel every second while gathering channel data every 500ms)

Waveform memory management changed : attributes raw and vertical data are now allocated in read_attr_hardware method.

StateMachine file added !! (oups)

ajout de la commande WriteRead

Sorts attr in expert and operator view with Pogo.
Inconsistencies removed.

calculation of offset of the begining of the struct, which contains the context of the waveform acquisition, in the received block data.