I'm trying to move to HTML5 on new projects, that don't require high cross-browser-ism. However, I can't find a way to add the HTML5 tags, such as header or aside, to "normal" tags within other html-tags, so they would be highlighted. Un-colored code really slows development down, so I have to stick with xhtml until this issue gets resolved.
I'm using Notepad++, so it would be great to fix this issue in it specifically. If that's out of range, I'd like to hear any other similar (light, compact) text-editor, which supports HTML5 better.