Have view controllers set status bar style.
Fix long-tap on back button to pop to root of navigation controller.

iOS 7 has two navbar subviews aligned with the back button. Break the tie by
picking the wider of the two.

For some reason, filtering then sorting the subviews seemed like the clearest
way to express this.
Update container view controllers for status bar style.
Fix status bar style when Awful navbar chooses it.
Transparent navbars and content underneath.
Switch to UIRefreshControl.

SVPullToRefresh didn't work so well with transparent navbars and content
sneaking up there. Plus UIRefreshControl looks cooler.
Delete pointless attributes.
Move forums list section headers out from under navbar.
Back to opaque navbars.

Just looks awful without the blur.
Use a standard toolbar for the posts view.

We can delete the page bottom bar.
Delete unused resources: font-size-{larger,smaller}.
Reenable secondary tag image view.

You know, the one for "buying" or "ask".
Better size and space rating images.

I thinned each rating bar by one pixel.

Instead of stretching the rating images to the width of the tag, it's now
simply centered under the tag.