Token sorting

Added sorting of machine and container tokens in the machine view.
The machine model list should define it's own comparator method...

```JavaScript
comparator: function(model) {
  this.get('sortMethod')(model);
}
```

And then in this method you simply have to set this attribute prior to calling sort. 

```JavaScript
machinesModelList.set('sortMethod', this._getSortMethod(this.get('machinesSort')));
```