Changes EnumHelper to report the line number of any error in data code mapping files.
Adds units for liters per bar and millibar per liter per second
Pass through the codepage for more informative error messages
Move frequent logging messages (related to realtime data) to TRACE level
Adds a Draeger mapping for nitrous, oxygen, and air flow measured data from medibus
Adds clock offset and r/t latency to the data model driving the devices list and crudely to the view of said model.
If realtime data are sent at 62.5Hz upsample the data to the allowable integer frequency 125Hz.
Chains slow data requests based upon acknowledgment.  Also removed codepage2 requests until we find data we need in that codepage.