RAGE virus infected

^Updated sounds for husk. Now it sounds like alpha from 28 years later movies. 

^Code-side of resource pack was fixed, so all vanilla sounds replaced by RP now.
^New skins for all variants, that looks more movie-like.

^Added optifine variants for zombies, that was made from old skins version.
^Added custom alpha spawn sound to use it in custom datapacks. Could be played by console, or written datapack.