updated sys and created publi

publi/node_modules/vinyl-fs/lib/dest/writeContents/writeStream.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var streamFile = require('../../src/getContents/streamFile');
+var fs = require('graceful-fs');
+
+function writeStream (writePath, file, cb) {
+  var opt = {
+    mode: file.stat.mode
+  };
+
+  var outStream = fs.createWriteStream(writePath, opt);
+
+  file.contents.once('error', cb);
+  outStream.once('error', cb);
+  outStream.once('finish', function() {
+    streamFile(file, cb);
+  });
+
+  file.contents.pipe(outStream);
+}
+
+module.exports = writeStream;