docs: updated @param tags, added missing function descriptions, other minor changes

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

src/nunchuck/nunchuck.hpp

@@ -67,7 +67,6 @@ namespace upm {
      * NUNCHUCK constructor
      *
      * @param bus I2C bus to use
-     * @param addr I2C address to use
      */
     NUNCHUCK(int bus);