old_contents: 
  /*
   * GET home page.
   */
  
  exports.index = function(Pressure) {
      return function(req, res) {
          Pressure.find({}, function(error, pressures) {
              res.render('index', {
                  title: 'Express',
                  pressures : pressures
              });
          })
      }
  };
  
  exports.addPressure = function(Pressure) {
      return function(req, res) {
          var pressure = new Pressure(req.body);
          pressure.save(function(error, pressure) {
              if(error || !pressure) {
                  res.json({ error : error });
              } else {
                  res.json({ pressure : pressure });
              }
          })
      }
  };
  
new_contents: 
  /*
   * GET home page.
   */
  
  exports.index = function(Pressure) {
      return function(req, res) {
          Pressure.find({}, function(error, pressures) {
              res.render('index', {
                  title: 'Blood Pressure Tracker',
                  pressures : pressures
              });
          })
      }
  };
  
  exports.addPressure = function(Pressure) {
      return function(req, res) {
          var pressure = new Pressure(req.body);
          pressure.save(function(error, pressure) {
              if(error || !pressure) {
                  res.json({ error : error });
              } else {
                  res.json({ pressure : pressure });
              }
          })
      }
  };
  
subject: change title