Dropout Layer

Implemented rng::uniform and rng::binomial for single values, vectors and matrices. implemeted dropout layers and tested it. Also fixed the validation code. Before it used y one place, now it uses y_test as it should.

include/random/engine.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <random>
+#include <cstdint>
+
+namespace rng {
+
+    using seed_type = std::uint64_t;
+    using engine_type = std::mt19937_64;
+
+    inline engine_type& engine() {
+        static thread_local engine_type eng{std::random_device{}()};
+        return eng;
+    }
+
+    inline void seed(seed_type value) {
+        engine().seed(value);
+    }
+
+}