Rolled module equalization properties into span ones in Grids SCSS.

This pull fixes equalization in scenarios like the following:
```
<div class="equalize">
	<div class="span-3 border-all">
		<h2>Heading</h2>
		<p>Content</p>
	</div>
	<div class="span-3 border-all">
		<h2>Heading</h2>
		<p>Content</p>
	</div>
</div>
```

Also, since ``module`` classes are always used in conjunction with ``span-*`` classes (at least from what I've seen), it's highly unlikely that anything would break in any pre-existing equalization+module implementations as a result of this change.