rhusb: Initial implementation

The driver implements support for the Omega RH-USB Humidity Probe with
Temperature sensor.  It connects via an integrated USB cable, and
appears as a serial port.

It does not currently work with Edison (as of this date) due to
missing ftdi_sio and usbserial kernel support.

It was implemented and tested on the Galileo 2.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/rhusb/pyupm_rhusb.i

@@ -0,0 +1,12 @@
+// Include doxygen-generated documentation
+%include "pyupm_doxy2swig.i"
+%module pyupm_rhusb
+%include "../upm.i"
+%include "stdint.i"
+
+%feature("autodoc", "3");
+
+%include "rhusb.h"
+%{
+    #include "rhusb.h"
+%}