code: function invokeOnComplete(slinkerOptions) {
      if (typeof slinkerOptions.onComplete === 'function' && slinkerOptions.modules.length === symlinksCreated.length) {
          slinkerOptions.onComplete();
      }
  }
docs: Invoked when slinker has finished creating all symlinks. If an onComplete callback has
  been specified, it is invoked.
  
  @param {Object} slinkerOptions
  The options passed to slinker