examples: Remove heap allocation from C++ examples

Cleanup of UPM C++ examples.  Switched from heap allocation to
stack allocation when possible.  This simplifies the samples since it
removes the need for explicit memory management.  A script was used to
identify and replace pointer use.  To simplify the replace script, I
re-formatted the C++ examples using the UPM .clang-format file.
Unfortuantely this changes the look of the UPM C++ examples to a large
degree.  However, examples will now have a standard look/feel and
uniform formatting.

    * Ran clang-format w/provided UPM .clang-format file
    * Removed new's/delete's whenever possible (left those in interface
      examples)
    * Added IIO sensor library implementation of callback void* arg
    * Converted all sleeps to upm defined delays (added header when
      necessary)
    * Scrubbed CXX example includes

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/c++/itg3200.cxx

@@ -22,30 +22,32 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <unistd.h>
+#include <stdio.h>
+
 #include "itg3200.hpp"
+#include "upm_utilities.h"
 
 int
-main(int argc, char **argv)
+main(int argc, char** argv)
 {
-//! [Interesting]
-    int16_t *rot;
-    float *ang;
+    //! [Interesting]
+    int16_t* rot;
+    float* ang;
 
     // Note: Sensor not supported on Intel Edison with Arduino breakout
-    upm::Itg3200* gyro = new upm::Itg3200(0);
+    upm::Itg3200 gyro(0);
 
-    while(true){
-        gyro->update(); // Update the data
-        rot = gyro->getRawValues(); // Read raw sensor data
-        ang = gyro->getRotation(); // Read rotational speed (deg/sec)
+    while (true) {
+        gyro.update();             // Update the data
+        rot = gyro.getRawValues(); // Read raw sensor data
+        ang = gyro.getRotation();  // Read rotational speed (deg/sec)
         fprintf(stdout, "Raw: %6d %6d %6d\n", rot[0], rot[1], rot[2]);
         fprintf(stdout, "AngX: %5.2f\n", ang[0]);
         fprintf(stdout, "AngY: %5.2f\n", ang[1]);
         fprintf(stdout, "AngZ: %5.2f\n", ang[2]);
-        fprintf(stdout, "Temp: %5.2f Raw: %6d\n", gyro->getTemperature(), gyro->getRawTemp());
-        sleep(1);
+        fprintf(stdout, "Temp: %5.2f Raw: %6d\n", gyro.getTemperature(), gyro.getRawTemp());
+        upm_delay(1);
     }
-//! [Interesting]
+    //! [Interesting]
     return 0;
 }