Build: Migrate to jquery-release - WIP

Fixes [#9793](http://bugs.jqueryui.com/ticket/9793)

I've been working on this for a while, mostly working with Rafael to fix a few issues in DB. I'm now at a point where this side of the script is in pretty good shape, but hit a roadblock I can't get over.

As you can see in the diff, I added a `build/test-release.js` script for testing the project-specific script. This works, generating the cdn zip file correctly (getting there took most of the time). When I actually run this as part of jquery-release, I get the console output for "Build CDN Package", but it never outputs `"Built zip CDN package at " + path.relative( "../..", targetZip )`, which is baffling since the script still continue runnings, going to the "PUSHING TAG" step. So the output is literally this:

```sh
Build CDN Package

##
## PUSHING TAG
##
```

Just a blank line inbetween, nothing else. I can't figure out why that happens. It certainly doesn't help that it takes a run of several minutes to even get to that point (which is why I created my separate test script in the first place, but that runs fine).

Once this is figured out, I still need to create the files for the CDN upload. This expects more files:

```
cp: no such file or directory: /Users/jza/dev/jquery-release/__release/repo/dist/cdn/*
```

We may want to adjust this in jquery-release itself, not sure yet.