Added initial interfaces and some sensors implementing them

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

examples/c++/iTemperature-sample.cxx

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <vector>
+
+#include "lm35.hpp"
+#include "abp.hpp"
+
+using namespace std;
+using namespace upm;
+
+int
+main()
+{
+  vector<iTemperature*> tempSensors {new LM35(0), new ABP(0, ABP_DEFAULT_ADDRESS)};
+
+  for (auto& sensor : tempSensors) {
+    float celsiusTemp = sensor->getTemperature();
+    cout << "Temperature in Celsius degrees: " << celsiusTemp << endl;
+    cout << "Temperature in Kelvin: " << iTemperature::convertCelsiusTo(celsiusTemp, TemperatureUnit::KELVIN);
+  }
+
+  for (auto& sensor : tempSensors) {
+    delete sensor;
+  }
+
+  return 0;
+}