Atmo

On this update, I added a part of the missing entities textures and made a lot of polishing and experiments on some of the textures of the items :)

NEW TEXTURES
added slime's texture
added magma cube's texture
added all the shulker colors
added the bow pullings textures
added blaze's texture
added squid's texture
added shader reflection to some of the shiny blocks: (ice blocks, emerald, gold, diamond block and ores, and more)

TWEAKS
-many items got an update, some of them still may change in futures updates
(I haven't kept a track of all the new textures modifications I did this time)