SoundFX

So zED I cropped the sfx files and convert it to ogg, and loaded/played it as you described on README.
Also changed the render.c to put my name in credits.
I create this pull request, because I don't have access to change any project under pseudogames which is weird since you added me as a member of pseudogames. Can you check it please?
I also start a new branch to working on highscore.