index.js
function(casper, pos) {
  this._pos = pos || {
    timestamp: Date.now(),
    coords: {
      longitude: 0, 
      latitude: 0, 
      accuracy: 0
    }
  };
  this._casper = casper;
}
function(casper, pos) {
  this._pos = pos || {
    timestamp: Date.now(),
    coords: {
      longitude: 0, 
      latitude: 0, 
      accuracy: 0
    }
  };
  this._casper = casper;
}
module