Migration towards TypeScript

This is going to be 1.1.0. Remaining TODOs:
* "npm run tsc" should generate declarations
* Add (restrictive) TSLint configuration
* Add support for TSLint in "npm test"

src/cli.ts

@@ -0,0 +1,6 @@
+'use strict';
+import batch = require('./batch');
+
+batch(process.argv, err => {
+  if (err) console.error(err);
+});