code: function Bootstrap_setListenPort(port) {
          if (Type.isNumber(port)) {
              this.listenPort = port;
          } else {
              this.listenPort = parseInt(port);
          }
      }
docs: @since 0.0.1
  @author Igor Ivanovic
  @method Bootstrap#setListenPort
  
  @description
  Set listen port