Added previous arduino implementations.

EulerProject.ino

@@ -0,0 +1,24 @@
+#include "Timer.h"
+
+#include "ProblemBase.hpp"
+#include "Problem3.hpp"
+
+Problem3 problem = Problem3();
+Timer timer(MICROS);
+// Initialize serial connection
+void setup() {
+  Serial.begin(9600);
+  Serial.println("Start calculating...");
+  timer.start();  // start the timer
+}
+
+// Calculation loop
+void loop() {
+  if (problem.Step()) {
+    // Print solution
+    Serial.println("Result = " + String(problem.output) + " in " + String(timer.read()) + "us");
+    timer.stop();
+    delay(100);
+    exit(0);
+  }
+}