By using this.$ as a selection of contiguous top-level nodes (text or otherwise) we can avoid wrapping each text node in a span
Change-Id: I141c2df8f13646db3fff0da93d218c2dcf154c8a
* Fixed constructor of ve.ce.BranchNode which was calling the wrong method to perform an onSplice and with the wrong arguments
* Removed/renamed events emitted from ve.ce.BranchNode.onSplice
* Reintroduced .$ to all ce nodes
* Ported over functionality for DOM node type variance used in headings, lists and list items
* Moved the old ve.ce.Content guts to ve.ce.TextNode
* Added getOffsetFromNode and getDataFromNode to ve.dm.DocumentFragment
* Added setDocument and getDocument to dm nodes
Change-Id: I185423ba2f1a858dde562cb2f5bc3852aec930db
* Also removed beforeSplice and afterSplice in favor of just plain splice which is the same as afterSplice used to be - beforeSplice was never used and it was making things more complex looking than needed
Change-Id: Icbbc57eac73a2a206ba35409ab57b3d1a49ab1a5
