* 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
