Added a pollerThread. Moved querying of the temperature, heater power, LN pump speed, and vacuum to the poller. Also made the poller query the status. Added PVs for relevant status bits.
Modifications (many hard-coded) to work on Windows. Can connect to the controller, but not read anything via USB. Can't connect to the controller via serial. May be a problem with the serial card.
Added a serialPort argument to LinkamConfig. Use OpenCommsFromDevice instead of OpenComms so that a linux serial port may be specified.
Added a temperature_RBV PV. Processing the record causes the driver to read the temperature, but the PV doesn't update, for some unknown reason.
