Token sorting

Added sorting of machine and container tokens in the machine view.
Having this bind repeated over and over makes this look cluttered, what about using currying doing something like...

```JavaScript
callback: this._sortColumnGenerator('date')
```

```JavaScript
_sortColumnGenerator: function(sorter) {
  var self = this;
  return function() {
    self.set('machineSort', sorter);
    self._renderMachines();
  };
}
```

I'll leave this up to you.