Added Stonehammer's Placeables

Added Stonehammer's Placeables for future work on Zelkor's Ferry.

_content/ratdog_content/sh_fence500.pwk

@@ -0,0 +1,19 @@
+# Exported from NWmax 0.8 b54 at 9/6/2021 10:10:08 AM
+# pwk file
+#
+#NWmax PWKMESH  ASCII
+node trimesh NoWalk
+  parent PLC_X0_FR2_pwk
+  position 0.0 0.0 0.0
+  orientation 1.0 0.0 0.0 0.0
+  wirecolor 0.521569 0.0156863 0.0156863 
+  bitmap NULL
+  verts 4
+    -2.5 -0.2 0.0
+    2.5 -0.2 0.0
+    -2.5 0.2 0.0
+    2.5 0.2 0.0
+  faces 2
+    2 0 3  1  0 0 0  7
+    1 3 0  1  0 0 0  7
+endnode