Add 3d model for battery holder.

schematic/desertbus.pretty/BHX2-2032-PC.kicad_mod

@@ -1,5 +1,5 @@
-(module BHX2-2032-PC (layer F.Cu) (tedit 5B737B9A)
-  (fp_text reference REF** (at 0 -7.62) (layer F.SilkS)
+(module BHX2-2032-PC (layer F.Cu) (tedit 5B74483D)
+  (fp_text reference REF** (at 0 16.51) (layer F.SilkS)
     (effects (font (size 1 1) (thickness 0.15)))
   )
   (fp_text value BHX2-2032-PC (at 0 7.62) (layer F.Fab)
@@ -16,4 +16,9 @@
   (pad 1 thru_hole circle (at -12.3 0) (size 3 3) (drill 2) (layers *.Cu *.Mask))
   (pad 2 connect rect (at 0 0) (size 5 5) (layers F.Cu F.Mask))
   (pad 1 thru_hole circle (at 12.3 0) (size 3 3) (drill 2) (layers *.Cu *.Mask))
+  (model ${KIPRJMOD}/packages3d/BHX2-2032-PC.wrl
+    (at (xyz 0 0 0))
+    (scale (xyz 1 1 1))
+    (rotate (xyz 0 0 0))
+  )
 )