Parad k

Driver page is at https://confluence.oceanobservatories.org/display/instruments/PARAD_K_STC_IMODEM+driver
Jira ticket https://jira.oceanobservatories.org/tasks/browse/CIDEVMI-846
Steve, are you sure you have the latest in here?  In the code review you said you were going to change this to use the encode_values, but that doesn't seem to have made it in here.