Init. Map does not function and only working on backend at the moment.

node_modules/sleep/sleep_posix.cc

@@ -0,0 +1,25 @@
+#include "sleep.h"
+
+#if ( _POSIX_C_SOURCE >= 200112L ) && ( !NAN_HAS_CPLUSPLUS_11 )
+
+#include <unistd.h>
+#include <sys/time.h>
+
+void node_usleep(uint32_t usec) {
+  useconds_t done;
+  struct timeval start, end;
+
+  while (usec > 0) {
+    gettimeofday(&start, NULL);
+    usleep(usec);
+    gettimeofday(&end, NULL);
+
+    done = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_usec - start.tv_usec);
+    if (done > usec) {
+      usec = 0;
+    } else {
+      usec -= done;
+    }
+  }
+}
+#endif