code: function Collector(inputTree, options) {
    if (!(this instanceof Collector)) {
      return new Collector(inputTree, options);
    }
  
    this.inputTree = inputTree;
  
    options = options || {};
    this.collectOptions = {
      inputFiles: options.inputFiles,
      excludes: options.excludes
    };
    this.outputFile = options.outputFile || 'imports.html';
  }
docs: Concatenates `<link rel="import" href="">` tags into a single file normalising
  hrefs relative to the new file location.
  
  @param inputTree
  @param options {
  inputFiles: ['** /*.html']
  outputFile: 'imports.html',
  excludes: ['regex']
  }