Next submission link - fixes #19

Fix #19 
Right, so AFCH is actually an object. What you want to do is refer to the `afchSubmission` object which is an *instance* of AFCH.Submission (which then has a prototype). I recommend taking a look at how JS prototypes work ... it's kind of cool (and very important for OOP and such).

```
afchSubmission.getNextSubmission().done( function ( title ) {
```