Xycraft content update

Added a new glass viewer CTM, moved the old one to the glass tank
texture.
Brought out the gems and bricks, swapped out the brick blocks for Shisen
bases for more originality.
Added multiblock sprite sheet
Added machine items sprite sheet
Swapped around structure +lamp texture with the unused alt
More needs to be done... especially about that corn. 1.5 is calling
though. ;)