Updates to xml view definition file parsing (ISSViewHierarchyParser): added support for `impl` attribute for specifying a custom implememtation class, added support for registering (the iOS6 way) UITableViewCell and UICollectionViewCell classes in the parent UITableView/UICollectionView, added support for propertly handling custom UITableViewCell/UICollectionViewCell sublasses. Fixes #7.
Minor sample code update.
Added support for associating a view with an alias, both though`UIView+InterfaCSS` and the xml view definition file (`alias` attribute).
Added support for setting properties on UICollectionViewFlowLayout.
Minor sample code update.
Updated section for 0.9.12.