Module code is strict by default (Traceur enforces this in compiled output code)

To support module "strict by default", all modules compiled by Traceur include the `use strict` pragma: 

```js
System.register("../scripts/generators", [], function() {
  "use strict"; <--- always included :)
  var __moduleName = "../scripts/generators";
  ...

});
```

(also: Awesome article!)

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>