Is there theme support built-in?

[Jandev]

I was looking into migrating my blog from Miniblog to Miniblog.Core.

The first thing I wanted to do is implement/migrate my custom theme, which I had created for Miniblog.

However, it looks like the custom theme support has been dropped completely, or am I missing something? I could, of course, modify all original files in order to match what I want, but if there's some way to do this much easier I'm happy to use that.