Reduce Ships Update specular map texture size as conversed with Stan.

Move rome_civic_center ao from structural folder to AO folder.
Committ Mistletoe headdres for celtic faction's Healer "Druid"

Thread:
https://wildfiregames.com/forum/index.php?/topic/25402-task-celtic-druid-re-texture/&tab=comments#comment-369730

This was SVN commit r22097.

binaries/data/mods/public/art/actors/props/units/helmets/celt_helmet_mistletoe.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<actor version="1">
+  <castshadow/>
+  <group>
+    <variant>
+      <mesh>props/helmet/celt_mistletoe.dae</mesh>
+      <textures>
+        <texture file="props/helmet/celt_mistletoe.png" name="baseTex"/>
+        <texture file="props/helmet/celt_mistletoe_norm.png" name="normTex"/>
+        <texture file="props/helmet/celt_mistletoe_spec.png" name="specTex"/>
+      </textures>
+    </variant>
+  </group>
+  <material>basic_trans_parallax_spec.xml</material>
+</actor>

binaries/data/mods/public/art/actors/structures/romans/civic_centre.xml

@@ -17,7 +17,7 @@
         <texture file="structural/rome_struct.png" name="baseTex"/>
         <texture file="structural/rome_struct_norm.png" name="normTex"/>
         <texture file="structural/rome_struct_spec.png" name="specTex"/>
-        <texture file="structural/roman_cc_ao.png" name="aoTex"/>
+        <texture file="structural/ao/rome_civic_center.png" name="aoTex"/>
       </textures>
     </variant>
   </group>