Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/tar/lib/mode-fix.js

@@ -0,0 +1,23 @@
+'use strict'
+module.exports = (mode, isDir, portable) => {
+  mode &= 0o7777
+
+  // in portable mode, use the minimum reasonable umask
+  // if this system creates files with 0o664 by default
+  // (as some linux distros do), then we'll write the
+  // archive with 0o644 instead.  Also, don't ever create
+  // a file that is not readable/writable by the owner.
+  if (portable)
+    mode = (mode | 0o600) & ~0o22
+
+  // if dirs are readable, then they should be listable
+  if (isDir) {
+    if (mode & 0o400)
+      mode |= 0o100
+    if (mode & 0o40)
+      mode |= 0o10
+    if (mode & 0o4)
+      mode |= 0o1
+  }
+  return mode
+}