1:100 sIG33 Infantry Gun

Cut the sIG33 out of TigerAce's awesome sIG 33 (Sf) auf Panzerkampfwagen I, in order to use it stand alone.

Increased the circular resolution of the barrel and wheels by extruding cylinders down the length.

I had to tweak the scale, as even at 1:100 is was still a bit too small. It was scaled until the overall length matched what was published on Wikipedia.

Also changed the origin so that it printed with the barrel parallel to the build plate.

Use m_bergman's Sd Kfz 11 to tow for FoW