Just need to stop removing the path to app in single file build

@robertd - you hit the nail on the head, dojo/i18n didn't know how to resolve the path tho `app/widget/nls` b/c I had added a step to comment out that path from the index file.

The solution is to stop commenting out that path! I didn't have a real good reason to comment that path out. I just figured it wasn't needed. I added it back in, and it all seems to work (after copying nls folder over).

I suggest we merge this PR instead of #14.