Wiki links in Infobox

I'm excited to finally have an infobox, so first off, thank you!

As I migrate several of my wikis over to 3.x, I've run into an annoyance with the current infobox. The only links supported are full urls. Often, I want to link to other wiki pages, and sometimes those pages might not exist yet; it'd be nice for them to show up red like other wiki links and be aliased, i.e. Foo showing up as 'Foo'.

A secondary request, while we're at it, would be to allow for some basic markdown content in the yaml, so for example, I could bold or italicise some of the values.