add preliminary vision60 urdf model (no real sizes, no real masses etc)

data/quadruped/vision/chassis.obj

@@ -0,0 +1,32 @@
+# Blender v2.78 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib chassis.mtl
+o Cube.002
+v -0.150000 -0.065000 0.043500
+v -0.150000 0.065000 -0.043500
+v -0.150000 -0.065000 -0.043500
+v -0.150000 0.065000 0.043500
+v 0.150000 0.065000 -0.043500
+v 0.150000 0.065000 0.043500
+v 0.150000 -0.065000 -0.043500
+v 0.150000 -0.065000 0.043500
+vn -1.0000 -0.0000 0.0000
+vn -0.0000 1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn -0.0000 0.0000 -1.0000
+vn -0.0000 0.0000 1.0000
+usemtl None.002
+s 1
+f 1//1 2//1 3//1
+f 4//2 5//2 2//2
+f 6//3 7//3 5//3
+f 8//4 3//4 7//4
+f 5//5 3//5 2//5
+f 4//6 8//6 6//6
+f 1//1 4//1 2//1
+f 4//2 6//2 5//2
+f 6//3 8//3 7//3
+f 8//4 1//4 3//4
+f 5//5 7//5 3//5
+f 4//6 1//6 8//6