Restructure project sources.

src/fmri/utils.cpp

@@ -0,0 +1,16 @@
+#include "utils.hpp"
+
+const float fmri::LAYER_X_OFFSET = -10;
+
+std::default_random_engine &fmri::rng()
+{
+    static std::default_random_engine rng;
+    static std::default_random_engine::result_type seed = 0;
+
+    if (seed == 0) {
+        std::random_device dev;
+        rng.seed(seed = dev());
+    }
+
+    return rng;
+}