Hypothermia

///EN/// Hypothermia is a short slaughter wad for boom(complevel 9) with five levels that mainly uses icy themes.  I often included some smaller fights of this type in maps, but this was my first attempt at a full-scale slaughter experience. Secrets are only used as easter eggs.Difficulty settings are implemented!-HMP is just a toned-down UV with fewer monsters. -HNTR is renamed to Imperturbable J…