A documentation of class "grid-offset" is missing

[Aybee]

Maybe you like to explain somewhere what this class is good for.

[nathansmith]

Yeah, I need to write up an explanation. Basically, it would be for if you want to add a mini "container" around something, to adjust side spacing.

<div class="this-has-a-background-or-a-border">
  <div class="grid-offset">
    <div class="grid-XX">
      Content
    </div>
    <div class="grid-XX">
      Content
    </div>
  </div>
</div>