Adds title3.ogg

New title music!

Full track here
https://dl.dropboxusercontent.com/u/9654207/SS13_TinTin.wav
(it sounds better in ogg ingame to me though)

In-game track fades out at around 1:25 to keep the file size down. It also has a fade in like title1. A remix of another old midi by the ever talented @Cuboos!
It's still raising clown.ogg from 2% to 4%. You don't need the sum to be 100, you can do something like `pickweight(list('sound/ambience/title2.ogg' = 49, 'sound/ambience/title1.ogg' = 49, 'sound/ambience/title3.ogg' = 49, 'sound/ambience/clown.ogg' = 2))` and it will preserve the current proportions while adding another option.