Add randomised appearances

[Talyda]

Like we have in minecolonies, just 'cos a big wall of them looks really boring all the same =)

[aelfwyne]

Definitely needs this. I didn't even notice the minecolonies ones had texture variations, until I placed these and was greeted with a ton of "same repeating pattern" which looks atrocious.

[Raycoms]

Adjusted this