Listing categories, showing it on main page.

Here is like a very basic prototype of what I want to build. By entering
url/category/post you will get the post from that category, this is the
main rule of Flerovium. I'm not planing to build some chronologie
timeline for posting getting since I believe the meta from the file will
organize it by date itself.

More explanations I will show lately since its not even working for all.