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++/tsl2561.cxx

@@ -24,30 +24,29 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#include <stdio.h>
+#include <stdlib.h>
 
-#include <unistd.h>
 #include "tsl2561.hpp"
 
-int main (int argc, char **argv)
+int
+main(int argc, char** argv)
 {
-    upm::TSL2561 *sensor = NULL;
     int loopCount = 100;
 
-//! [Interesting]
+    //! [Interesting]
     if (argc < 2) {
         printf("Provide loop count \n");
     } else {
         loopCount = atoi(argv[1]);
     }
-    sensor = new upm::TSL2561();
+    upm::TSL2561 sensor;
 
-    for(int i=0; i< loopCount; i++){
-        fprintf(stdout, "Lux = %d\n", sensor->getLux());
+    for (int i = 0; i < loopCount; i++) {
+        fprintf(stdout, "Lux = %d\n", sensor.getLux());
     }
 
-//! [Interesting]
-
-    delete(sensor);
+    //! [Interesting]
 
     return (0);
 }