code: function _fetchWordList(path, callback) {
      var words = [];
  
      axios.get(path)
      .then(function(response) {
  
        var jsonData = response.data;
  
        if(response.responseType === 'text') {
          jsonData = JSON.parse(jsonData);
        }
  
        if(Array.isArray(jsonData.words)) {
          words = jsonData.words;
        }
  
        callback(words);
      }.bind(this))
      .catch(function(error) {
        callback(words);
      }.bind(this));
    }
docs: Fetches the word list from an address
  @param  {String} path Path of a JSON file with an array called 'words' with the word list
  @return {Array}      Word list extracted from the given path