Fixed bower name & version

Fixed: This package is published as `auth0.js` so the name `auth0-js` was incorrect (and causing warnings in `bower install`).
Fixed: Version was out of sync with the git tags and also with `package.json`. This is an [optional property](https://github.com/bower/bower.json-spec/blob/master/README.md) and safe to remove, as it defaults to the git tag.