rpr220: doxygen comments and adding image from seeed wiki

Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

src/rpr220/rpr220.h

@@ -29,7 +29,20 @@
 namespace upm {
 
 /**
-   * @brief C++ API for the RPR220 based Grove IR Reflective Sensor. 
+ * @brief RPR220 IR Reflective Sensor library
+ * @defgroup rpr220 libupm-rpr220
+ * @ingroup seeed gpio light
+ */
+/**
+ * @library libupm-rpr220
+ * @sensor rpr220
+ * @comname rpr220 IR reflective sensor
+ * @type light
+ * @man seeed
+ * @web http://www.seeedstudio.com/wiki/Grove_-_Infrared_Reflective_Sensor
+ * @con gpio
+ *
+ * @brief C++ API for the RPR220 based Grove IR Reflective Sensor
  * 
  * UPM module for the Grove IR Reflective Sensor.  The sensitivity
  * can be adjusted with the potentiometer on the sensor module.  It
@@ -42,8 +55,8 @@ namespace upm {
  * Service Routine (ISR) can be installed that will be called when
  * black is detected.  Either method can be used, depending on your
  * use case.
-
-   * @ingroup grove gpio
+ *
+ * @image html rpr220.jpeg
  * @snippet rpr220.cxx Interesting
  * @snippet rpr220-intr.cxx Interesting
  */