Implement many more nodes

Adds these new styling and formatting nodes
* strike
* highlight
* linebreaks
* pagebreaks
* Hyperlinks

lib/notare/xml/styles_xml.rb

@@ -59,6 +59,8 @@ module Notare
           xml["w"].b if style.bold
           xml["w"].i if style.italic
           xml["w"].u("w:val" => "single") if style.underline
+          xml["w"].strike if style.strike
+          xml["w"].highlight("w:val" => style.highlight) if style.highlight
         end
       end
     end