Quite a big update

After getting to know more about alpha textures
shaders to all skins have been improved

Some skins redesigns, details and improvements aswell:

Thru-Hell blood textures no longer shines with the skin itself
Green tint now more worn and feels like paint over it
Orange Wood has new unique details
Old classic has been more worn down
Slightly more details for Police Tactical
Small tweaks over Exponent texture

Fixes:
All rear sight textures are no longer pitch black

Sacrifises:
It is now 11mb instead of 5mb
increase size for more shader details of using DXT5