Init. Copied over heload, made a minimal tester.

test/manual/minimal.cpp

@@ -0,0 +1,18 @@
+#include "minimal_lib.h"
+
+#include <chrono>
+#include <cstdio>
+#include <thread>
+
+int main(int argc, char *argv[]) {
+
+  int modified = -1;
+  while (modified != 0) {
+    modified = minimal_lib::getModified(5);
+    printf("getModified(5): %d\n", modified);
+
+    std::this_thread::sleep_for(std::chrono::seconds(1));
+  }
+
+  return 0;
+}