code: function scanTreeForNodesModules(moduleName) {
      var dir = settings.coreNodesDir;
      var results = [];
      var userDir;
  
      if (settings.userDir) {
          userDir = path.join(settings.userDir,"node_modules");
          results = scanDirForNodesModules(userDir,moduleName);
          results.forEach(function(r) { r.local = true; });
      }
  
      if (dir) {
          var up = path.resolve(path.join(dir,".."));
          while (up !== dir) {
              var pm = path.join(dir,"node_modules");
              if (pm != userDir) {
                  results = results.concat(scanDirForNodesModules(pm,moduleName));
              }
              dir = up;
              up = path.resolve(path.join(dir,".."));
          }
      }
      return results;
  }
docs: Scans the node_modules path for nodes
  @param moduleName the name of the module to be found
  @return a list of node modules: {dir,package}