adding configuration for bower to enable glob to be installed using bower

I have added a `bower.json` to enable glob to be installed using bower (or to be a depedency of an existing bower component).  For more information on bower see: http://bower.io/.

I would be grateful if you could merge this into you project then run:

```bash
bower register glob git://github.com/isaacs/node-glob.git
```

(see: http://bower.io/docs/creating-packages/)

This will then register you git repository with bower and allow anyone to install glob using:

```bash
bower install glob
```

And it will allow me to have glob as a dependency in my project [mockserver-grunt](https://www.npmjs.org/package/mockserver-grunt)

Thanks,

James