Provide a bower package file and set version to 0.4.0

This update provides Bower support with a package file, and resolves #9.

Additionally, `openfb.js` was moved into a `dist` directory, which provides a common directory layout where a minified version could also be provided.

After merging, you can register the component so that it is discoverable with the following:

```sh
$ bower register openfb https://github.com/ccoenraets/OpenFB
```
This will allow anyone to then run `bower install openfb` to install the library.

You will also need to create and push a git tag that corresponds to the version number so Bower can [pick it up](https://github.com/bower/bower.json-spec#version).

You can do this easily enough by tagging a [release](https://github.com/ccoenraets/OpenFB/releases), or just issuing the following:

```sh
$ git tag v0.4.0
$ git push origin v0.4.0
```
That should about do it. Cheers!