FreeHL/SH: Weapon prediction improvements
FreeCS: Added back in basic bullet-penetration/wallbanging. It doesn't do anything but go through 4 layers. I made a testmap on which I'll start document 1.5 wallbanging behaviour.
Also changed the way game-init works. Still gotta rename the Game_Worldspawn to reflect what it actually does now.
TODO: Add a Game_InitEnts alongside Game_Init?