Added a couple of features for blog posts.

Hey there, I'm really digging your theme. I've been working on migrating to it and thought these two additional features would be a good idea. Not sure if they align with your vision, but I am sending this pull request incase you think it's a good idea. Maybe you can improve the design of this too (I'm not a designer :smiley: ).

I put as much detail as I could into the commit message so I won't bother repeating it in this pull request. This is my first pull request so let me know if I'm supposed to.