ReadFileOrStdin reads a file or reads stdin.

ReadJSON reads JSON from a file or a URL.

ReadJSONFileOrStdin reads a JSON file(s), or if there are none, reads from stdin.

ReadJSONMultiple reads multiple JSON files.

ReadSpreadsheetFile reads a CSV or Excel file.

ReadURL reads a file or a URL.

StreamFileOrStdin reads file(s), or if there are none, reads frm stdin.

JSSource returns the svgpan.js file.