Major structural overhaul. Some bugfixes. And new features, yay.

Organized code modules into subfolders.

-Features-
Bosses can move around the screen.
Synchronize-mod now causes returning fire, its original behaviour was
scrapped.

-Fixes-
Pause button works even when player destroyed or game waiting.
Player respawns instantly when using a continue.
Generally speaking, wait timers are now a lot less dependant on one
another.