v0.5 update!

- All graphics are now truecolour (so you can play it with wads that change the base palette)

- Lost souls and ghouls now don't count in monsters amount

- Purist/Vanilla-esque mode (that was easier to implement than I thought)

- Added gamemode portraits (similiar to BD v22)

- Added casings for zombiemen, shotgunners and commandos

- Changed Spectre's visuals

Coined for Vanilla-esque mode: Doomguy is ambidextrous, Doom's pistol is a beretta, iconic fist idle sprite