manson-hcs-3xxx: Fixed build without libserialport.
manson-hcs-3xxx: Added missing models of series, fixed current resolution.
manson-hcs-3xxx: Cleanup, improved error handling, docs.
manson-hcs-3xxx: Implemented setting voltage, current and output.
serial: docs.
manson-hcs-3xxx: Use maximum voltage and current read from device.
Add VID/PID for Testo 435.
Add MQ/units for wind speed, pressure and humidity at 293 kelvin.
Add printers for wind speed, pressure and humidity at 293 kelvin.
testo: Initial driver skeleton.
testo: Initial driver implementation.

This adds support for the Testo 435-4, with differential pressure
measurement built in, and probes for wind speed and temperature/humidity
at 293 kelvin.

Support for other probe types will have to be added by people with
access to those probes.

Models other than the 435-4 may well work unchanged, but this is
difficult to predict. Most likely new unit types will need to be added,
and possibly the protocol handling may need to be more flexible and
model-dependent to cope with 5-byte values and other minor changes
in the protocol.
testo: More robust probing and packet checking.

The CRC in every packet is now also checked. Thanks to Aurelien
Jacobs for the CRC function.
testo: Detach kernel driver as needed, and code optimization.

Thanks to Aurelien Jacobs for the CRC check code improvement.
saleae-logic16: Drop unused variable.
testo: Remove unused dependency on libserialport.
Minor code cleanup.
autoconf: Use DRIVER macro to declare drivers.
Move conditional driver cruft to separate source file.
swig: Use new output API.