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++/grove-groveled.cxx

@@ -23,33 +23,34 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <unistd.h>
 #include <iostream>
-#include "grove.hpp"
+#include <string>
+
+#include "groveled.hpp"
+#include "upm_utilities.h"
 
 int
-main(int argc, char **argv)
+main(int argc, char** argv)
 {
-//! [Interesting]
+    //! [Interesting]
 
     // Create the Grove LED object using GPIO pin 2
-    upm::GroveLed* led = new upm::GroveLed(2);
+    upm::GroveLed led(2);
 
     // Print the name
-    std::cout << led->name() << std::endl;
+    std::cout << led.name() << std::endl;
 
     // Turn the LED on and off 10 times, pausing one second
     // between transitions
-    for (int i=0; i < 10; i++) {
-        led->on();
-        sleep(1);
-        led->off();
-        sleep(1);
+    for (int i = 0; i < 10; i++) {
+        led.on();
+        upm_delay(1);
+        led.off();
+        upm_delay(1);
     }
 
     // Delete the Grove LED object
-    delete led;
-//! [Interesting]
+    //! [Interesting]
 
     return 0;
 }