With the current example, it would rather be:

```
$('.courseware-content').xblock({
     courseId: 'TestX/TST-BRGT/2015-12',
     usageId: 'i4x:;_;_TestX;_TST-BRGT;_vertical;_0c4f0ca3c3f54a1b8ad5d9830c1d16b0',
```

Given that `TestX/TST-BRGT` is already contained in the `usageId`, I'd rather not ask for the same information twice.

@cpennington Is there a URL format for addressing an XBlock which includes the class run? Right now we use `i4x:;_;_TestX;_TST-BRGT;_vertical;_0c4f0ca3c3f54a1b8ad5d9830c1d16b0` which doesn't.

If not then we should probably only ask for the missing information, ie the course run id:

```
$('.courseware-content').xblock({
     usageId: 'i4x:;_;_TestX;_TST-BRGT;_vertical;_0c4f0ca3c3f54a1b8ad5d9830c1d16b0',
     courseRunId: '2015-12',
```

And while we are cleaning things up, we could also unescape the usageId:

```
$('.courseware-content').xblock({
     usageId: 'i4x://TestX/TST-BRGT/vertical/0c4f0ca3c3f54a1b8ad5d9830c1d16b0',
     courseRunId: '2015-12',
```