WS3500 AlectoV1 working now

Hi,

This code is for all Alecto V1 protocol weather stations. Prologue is detecting these device also, but representation of the fields is not correct.

AlectoV1 is used by Alecto, Ventus, Oregon and more.
tested with:
Oregon Scientific THN132N (temp/hym sensor) 
Alecto WS3500, WS4500 (weatherstation)
Ventus W155 (weatherstation) 
Ventus W044 (temp/hym sensor) 
Ventus W155 (weatherstation)
Alecto DKW2012 (weatherstation on 868 MHZ!) 

Please comment/edit