mg811: Initial implementation

This driver was developed on a DFRobot CO2 sensor based on the MG811:
http://www.dfrobot.com/index.php?route=product/product&product_id=1023

It seems to *require* very precise calibration at 400ppm and 1000ppm
to be accurate.  It also gets pretty hot (due to the heater) and
consumes significant current.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: sisinty sasmita patra <sisinty.s.patra@intel.com>

src/mg811/pyupm_mg811.i

@@ -0,0 +1,9 @@
+%module pyupm_mg811
+%include "../upm.i"
+
+%feature("autodoc", "3");
+
+%include "mg811.h"
+%{
+    #include "mg811.h"
+%}