EJS Partials not working

When I call:

```
<%= this.partial("somepartial.html.ejs") %>
```

I get this:

```
500 TypeError: Object # has no method 'partial'
```

The issue is `this` is the `render` function in the view. The context has to be passed in when rendering.

I have a the fix and the updated specs in my fork. Will comment on this issue with the SHA.
