Machinesheds v1.1.0.0

This machineshed comes in three sizes: 30, 40 and 50 meters. Thanks to an ingenious steelconstrucion it has less pillars and so its easier to move your machinery in.
Changelog 1.1.0.0:
-Raised moddesc number
-Added Seasons support
-Texture fixes:added dirt, material changes and less dark shadows inside
-Added some decos