minor visual change for bullets
Turned EntityManager into a subsystem
Added super class constructor call to CameraDynamicsSubsystem (superclass's constructor is a NOP, but who knows what the future holds)
Made subsystems update in the order of their creation (required for LLDD)
Turned Subsystem:new() into a real NOP and broke dependency on Gamestate for all subsystems, as it should be
Moved font selection out of main.lua into the game screens
added gamestate updates to gameover screen, removed them from main
Turned everything possible into a subsystem, added it to gamestate's subsystem manager
syntax cleanup
Reordered imports in loverman to match inter-dependencies