Pixel Perfection - Freshly Updated!

-fixed sky issues with optifine/mcpatcher
-alt textures for natural sandstone/red sandstone
-alt textures for planks
-made ALL textures with alts apply the alt textures to their stairs and slabs as well (yes, that includes older textures like cobble)
-new mobs from 1.10 aka husk and stray! (working on the 1.11 mobs)
-tweaked all skelly textures (now with 200% more skellington)
-changed around a few textures
-added textures for 1.11 things such as the new items and observer block