2.0 upgrade

As of the new 2.0.0 version of Isotope, it works with requirejs and bower without modifications!

To install it in a template:

```shell
bower install --save isotope
```

To use the jQuery plugin:

```javascript
require('bower_components/isotope/jquery.isotope');
```

To use Isotope "in the raw":

```javascript
var Isotope = require('isotope');
```

This is mostly a notification to **stop** using this repo and just start using the mainline version of Isotope instead.

This repo should probably continue to exist for legacy reasons, at least for a while. If anyone disagrees and wants to kill it now, I'm all ears.