code: function rawgit( options ) {
  	var opts;
  	var err;
  
  	opts = copy( defaults );
  	err = validate( opts, options );
  	if ( err ) {
  		throw err;
  	}
  	opts.slug = opts.slug.replace( DANGLING_SLASH, '' );
  	opts.file = opts.file.replace( FILEPATH_PREFIX, '' );
  
  	return url( opts );
  }
docs: RAWGIT URL // 
  FUNCTION: rawgit( options )
  Returns a RawGit URL for a file hosted in a public Github repository.
  
  @param {Object} options - function options
  @param {String} options.slug - public Github repository slug
  @param {String} options.file - filepath
  @param {Boolean} [options.cdn=true] - boolean indicating whether to return a CDN URL
  @returns {String} RawGit URL