Consider markdown-style hyperlink support.

[alanxoc3]

This was just an idea. What if cards could have markdown-style links. Like:

[A Website](http:/ddg.gg)

The "A Website" part would contribute towards the hash, but the actual link
would not be counted towards the hash. I'd have to think about it more before I
consider this.

Maybe I could also consider links to local files too (like audio or images for
more interactive cards).

[alanxoc3]

What do I think about linking that point within the current file?

That's probably not a good idea, because it would require to know context. But maybe it can lead me to a good idea later.