Upgrade Xcode project settings.
Require iOS 6 or higher.
Remove PSTCollectionView.

iOS 6 ships with a collection view so we're all set.
Fix deprecations introduced in iOS 6.
Stop Xcode console spam.
Require iOS 7.

- Fix deprecations: text sizing/drawing, content sizes, status bar styles,
  text attributes.
- Keep view controllers out from under the navigation bar and status bar.
- Fix selected tab icons (make them white, not black).
- Delete "plain" bar button hack. Just use non-plain for now.
Remove iOS 5 fixes/workarounds.
Bump version to 2.0.
Clean up nav bar.

- Change its appearance a la mockups.
- Remove custom left button action.
Remove unused header.
Remove AwfulForum.expanded property.

I'd somehow missed this property in my earlier crusade to remove all user data
from Core Data. I took the opportunity to clean up some bits of the forums list
controller too.
Implement and use basement view controller on iPhone.
Random Xcode whatever.
Set project class prefix to 'Awful'.
Fix copyright header.
Update code sign identity and provisioning profile.
Put new app icon and iPhone launch image into asset catalog.
Dave's iOS7 inspired icon
Remove unused icon.
Lazily create basement's sidebar.