Merge branch 'net2'

Expect instability on the master branch for a while.
Problems:
  - Documentation is not yet updated

  - SSL support is gone! It needs to be redone for net.js.  Use 'tcp_old'
    and 'http_old' if you need it. I want to use OpenSSL now, talk to me if
    you'd like to work on it.

  - fs.write() supports Buffers a little. See src/node_file.cc for details
    fs.read() not yet. The file streams need to be updated to handle Buffer.

  - The Buffer API will probably change.