message: Adding usage help to version-remover
diff: -// usage: node version-remover [source d.ts] [API set name] [output file name]
  -// example: node version-remover excel.d.ts "ExcelApi 1.8" excel_1_7.d.ts
  import * as fsx from "fs-extra";
  +if (process.argv.length != 5 || process.argv.find((x: string) => {return x === "-?"})) {
  + console.log("usage: node version-remover [source d.ts] [API set name] [output file name]");
  + console.log("example: node version-remover excel.d.ts \"ExcelApi 1.8\" excel_1_7.d.ts");
  + process.exit(0);
  +}
  +
  console.log("Version Remover - Creating " + process.argv[4]);
  let wholeDTS = fsx.readFileSync(process.argv[2]).toString();
  