code: function(namespace, config) {
          if ( typeof(config) == "undefined" )
              var config = self.getSync(app);
  
          if (config != null) {
              var split = namespace.split('.'), k=0;
              while (k<split.length) {
                  config = config[split[k++]]
              }
              return config
          } else {
              return null
          }
      }
docs: Get var value by namespace
  
  @param {string} namespace
  @param {object} [config ] - Config object
  @return {*} value - Can be String or Array
  
  @private