add 'random' library

src/util/random.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <random>
+#include <string>
+#include <algorithm>
+
+namespace util {
+    template <class T = std::mt19937, std::size_t N = T::state_size * sizeof(typename T::result_type)>
+    typename std::enable_if<N, T>::type seeded_random_engine(
+        std::random_device& source
+    ) {
+        std::random_device::result_type randomData[(N - 1) / sizeof(source()) + 1];
+        std::generate(std::begin(randomData), std::end(randomData), std::ref(source));
+        std::seed_seq seeds(std::begin(randomData), std::end(randomData));
+        return T(seeds);
+    }
+
+    std::string generate_uuid();
+}