flex: initial implementation

Implements the flex analog sensor.  See
http://bildr.org/2012/11/flex-sensor-arduino/
for wiring instructions.

Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

src/flex/pyupm_flex.i

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