Add bower.json

Make the package publishable in the bower registry.

Can you also register the package afterwords by issuing:

```bash
bower register javascript-unicode git://github.com/reyesr/javascript-unicode.git
```

For that you'll need bower installed (`npm install bower`, given you have node (npm) installed).

Also can you tag the commit having the bower.json, with `git tag 0.1.0 && git push origin --tags`.

Awesome work btw!