Major thread-ization of many game functions

[Sulunia]

--Grande thread-ificação de várias funções do jogo

A lot of heavy stuff is currently being done in the main thread, thus freezing the game. I will soon start changing many elements to go on separate threads, such as FFT effect calculation (will bring cool effects to mobile with no cost to performance... hopefully) and file parsing.

Big problem: This will cost quite a bit of time (testing) and will distract me from more pressing matters (actual score logging, game being able to completely loop), so, i'll mark this as future improvement!

[Sulunia]

Issue has been closed, moved to a milestone instead!