[models] Remove "weak" reference for iOS 4 compat.
[attributedlabel] Docs cleanup.
[launcher] Docs cleanup.
[models] Remove redundant readwrite property descriptor.
[models] Fix unit tests.
[core] Update namespace header.
[models] Move NITableViewModelSection to private header.
[pagingscrollview] Don't change the background color when changing superviews.

Also moved the private ivars to the .m.
[core] Modernize NIIsPad.
[attributedlabel] Add support for inline images.
[attributedlabel] Fix build errors on Xcode 4.3.
[models] Implement heightForObject:atIndexPath:tableView: for NIDrawRectBlockCell.

This makes it easier to use the NICell with heightForObject:atIndexPath:tableView:.
[models] Add standard methods to NICellFactory for calculating cell height.

There are two variants introduced here:

- Static implementation that only looks at implicit cell mappings.
- Instance implementation that looks at explicit cell mappings first, and
  then falls back to implicit cell mappings.
[photos] Update the chrome after changing the current photo by tapping the arrow buttons in the controller.
[photos] Allow netowrk photo album example project to rotate on iOS 6.
[photos] Remove need for colored background of paging scroll view.

Touches were being eaten if the view controller did not have a background color set, not the paging scroll view.

Closes #262.
[pagingscrollview] Only load new pages when scrolling stops in some fashion.
[overview] Fix strict warnings.
[overview] Use pushViewController:animated: rather than depend on UINavigationController class to push the in-memory cache info controller.
[overview] Fix more strict warnings.