Extract Core::TextFile from TextEditor::BaseTextDocument.
Use it in BaseTextEditor and Designer to preserve CRLF of the files. Task-number: QTCREATORBUG-5901 Change-Id: I7599ce78649a3b09f2e5118d02f8cbf3db27ed31 Reviewed-on: http://codereview.qt.nokia.com/3591 Reviewed-by:Friedemann Kleint <Friedemann.Kleint@nokia.com>