Log Message:
Update lang/nodejs4 to 4.6.2.

- build: It is now possible to build the documentation from the release
  tarball
- buffer: Buffer.alloc() will no longer incorrectly return a zero filled
  buffer when an encoding is passed
- deps: upgrade npm in LTS to 2.15.11
- repl: Enable tab completion for global properties
- url: url.format() will now encode all # in search