max31723: Adding doxygen comments and removing image

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

src/max31723/max31723.h

@@ -36,9 +36,16 @@ namespace upm {
 /**
  * @brief max31723 temperature sensor library
  * @defgroup max31723 libupm-max31723
+ * @ingroup maxim spi temperature
  */
-
 /**
+ * @library libupm-max31723
+ * @sensor max31723
+ * @comname max31723 temperature sensor
+ * @type temperature
+ * @man maxim
+ * @con spi
+ *
  * @brief C++ API for MAX31723 chip (Temperature sensor)
  *
  * The Maxim Integrated
@@ -48,9 +55,7 @@ namespace upm {
  * module](http://datasheets.maximintegrated.com/en/ds/MAX31723PMB1.pdf) from
  * the analog PMOD kit.
  *
- * @ingroup max31723 spi
  * @snippet max31723.cxx Interesting
- * @image html max31723.jpeg
  */
 class MAX31723 {
     public: