* Removed `SiteTree.MetaTitle` and `SiteTree.MetaKeywords` since they are irrelevant in terms of SEO ([1](http://www.seomoz.org/learn-seo/title-tag), [2](http://www.mattcutts.com/blog/keywords-meta-tag-in-web-search/)) and general page informancy
*`SiteTree::$nested_urls` enabled by default. To disable, call `SiteTree::disable_nested_urls()`.
* Removed CMS permission checks from `File->canEdit()` and `File->canDelete()`. If you have unsecured controllers relying on these permissions, please override them through a `DataExtension`.