old_contents: 
  var Bot = require('./lib/Bot')
    , fs = require('fs');
  
  bot.sendPhoto({
    chat_id: USER_ID,
    caption: 'Telegram Logo',
    files: {
      photo: './examples/logo.png'
    }
  }, function (err, msg) {
    console.log(err);
    console.log(msg);
  });
  
new_contents: 
  var Bot = require('../lib/Bot')
    , fs = require('fs');
  
  bot.sendPhoto({
    chat_id: USER_ID,
    caption: 'Telegram Logo',
    files: {
      photo: './examples/logo.png'
    }
  }, function (err, msg) {
    console.log(err);
    console.log(msg);
  });
  
subject: Fix example