Update Timer class to accept functions with any number of parameters

Util/Util.cpp

@@ -0,0 +1,25 @@
+#include <algorithm>
+#include "Util.h"
+
+
+namespace PresenceDetection {
+namespace Util {
+
+std::string CreateRandomString(size_t length)
+{
+	auto randchar = []() -> char
+	{
+		const char charset[] =
+			"0123456789"
+			"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+			"abcdefghijklmnopqrstuvwxyz";
+		const size_t max_index = (sizeof(charset) - 1);
+		return charset[ rand() % max_index ];
+	};
+	std::string str(length,0);
+	std::generate_n(str.begin(), length, randchar);
+	return str;
+}
+
+} // namespace Util
+} // namespace PresenceDetection