Add `bower.json` manifest file for `rdio` bower package

I fixed the url in the bower registry for the `rdio` package. I recommend:

```
git checkout -b danheberden-issue_7
git pull git://github.com/danheberden/jquery.rdio.js.git issue_7
git checkout master
git merge danheberden-issue_7
git branch -D danheberden-issue_7
git tag v0.1.0
git push origin master --tags
```