samples/3D/ModelViewer/models: Added more sample models (public domain)
- From sharecg.com:
	http://www.sharecg.com/v/25775/related/5/3D-Model/Cart-for-the-Barn-for-3d-Max-3DS-and-Obj
	http://www.sharecg.com/v/25305/related/5/3D-Model/Old-Barn-for-3d-Max-3DS-and-Obj
	http://www.sharecg.com/v/27995/browse/5/3D-Model/House-project-n1-for-3d-Max-9-and-Revit
   http://www.sharecg.com/v/27896/view/5/3D-Model/Set-Lunch-Room-for-3d-Max-9-3DS-and-OBJ

      by Shamira (verrina@virgilio.it / www.comixgraffit.com)

   http://www.sharecg.com/v/43801/gallery/5/3D-Model/Katanakake
      by Birdman
samples/3D/ModelViewer: Removed unused texture