Revert "Delete node_modules directory"

This reverts commit 94857d1cb1.

node_modules/tweetnacl/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,20 @@
+# Important!
+
+If your contribution is not trivial (not a typo fix, etc.), we can only accept
+it if you dedicate your copyright for the contribution to the public domain.
+Make sure you understand what it means (see http://unlicense.org/)! If you
+agree, please add yourself to AUTHORS.md file, and include the following text
+to your pull request description or a comment in it:
+
+------------------------------------------------------------------------------
+
+    I dedicate any and all copyright interest in this software to the
+    public domain. I make this dedication for the benefit of the public at
+    large and to the detriment of my heirs and successors. I intend this
+    dedication to be an overt act of relinquishment in perpetuity of all
+    present and future rights to this software under copyright law.
+
+    Anyone is free to copy, modify, publish, use, compile, sell, or
+    distribute this software, either in source code form or as a compiled
+    binary, for any purpose, commercial or non-commercial, and by any
+    means.