Game genres

Love the new icon set, it looks really good! They could maybe be a bit clearer, but that is a minor problem for now.

The genre descriptions need a bit of work though, they seem to be too long winded and technical. Simplify the language, and reduce the word-count, and it'll be a lot more user friendly, in my opinion.

(also, I made a LGDB plugin for djl. Hopefully we'll see it in the release branch in a week or two :) )