docs: function getVersions(projectRoot) {
      var platformsDir = path.join(projectRoot, 'platforms');
      var platformsJsonFile = path.join(platformsDir, 'platforms.json');
  
      // If the platforms.json file doesn't exist, retrieve versions from platforms installed on the filesystem...
      // ...Note that in this case, we won't be able to know what source(folder, git-url) the platform came from, we'll just use versions
      return getPlatVersionsFromFile(platformsJsonFile).fail(function(){
          return getPlatVersionsFromFileSystem(projectRoot);
      });
  }