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++/nmea_gps-i2c.cxx

@@ -22,11 +22,11 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <unistd.h>
 #include <iostream>
 #include <signal.h>
 
 #include "nmea_gps.hpp"
+#include "upm_utilities.h"
 
 using namespace std;
 
@@ -34,36 +34,35 @@ bool shouldRun = true;
 
 const size_t bufferLength = 128;
 
-void sig_handler(int signo)
+void
+sig_handler(int signo)
 {
-  if (signo == SIGINT)
-    shouldRun = false;
+    if (signo == SIGINT)
+        shouldRun = false;
 }
 
-int main()
+int
+main()
 {
-  signal(SIGINT, sig_handler);
+    signal(SIGINT, sig_handler);
 
-//! [Interesting]
+    //! [Interesting]
 
-  // Instantiate a NMEA_GPS UBLOX based i2c sensor on i2c bus 0 at
-  // address 0x42
-  upm::NMEAGPS *sensor = new upm::NMEAGPS(0, 0x42);
+    // Instantiate a NMEA_GPS UBLOX based i2c sensor on i2c bus 0 at
+    // address 0x42
+    upm::NMEAGPS sensor(0, 0x42);
 
-  // loop, dumping NMEA data out as fast as it comes in
-  while (shouldRun)
-    {
-      if (sensor->dataAvailable(0))
-        usleep(100);
-      else
-        cout << sensor->readStr(bufferLength);
+    // loop, dumping NMEA data out as fast as it comes in
+    while (shouldRun) {
+        if (sensor.dataAvailable(0))
+            upm_delay_us(100);
+        else
+            cout << sensor.readStr(bufferLength);
     }
 
-//! [Interesting]
+    //! [Interesting]
 
-  cout << "Exiting" << endl;
+    cout << "Exiting" << endl;
 
-  delete sensor;
-
-  return 0;
+    return 0;
 }