removeStyle helper

There should be a helper for removing style attributes from a set of elements

* Add fixtures (requirejs-text is required)
* Using classes to track which items to use for which tests (may not stick)

**Reviewers:** @scalvert 

#### How to test:
Update tests/runner/main.js manually:

```
            var tests = [
                '../../tests/unit/capitalizeTests.js',
                '../../tests/unit/removeStyleTests.js'
            ];
```
I see what you're trying to achieve, but testing shouldn't be focussed on the infrastructure around what we're testing. For instance you wouldn't write a unit test that tests a mock, fake, or spy. Additionally, once setup you wouldn't expect the fixture to change. If it does and your tests break, you would most likely react at that time.

This will set a precedent that we need to test all our fixtures, which will add a lot of overhead.

Let's remove this for now!