Animated Roman ballista siege weapon with delayed attack sounds.

This was SVN commit r10886.

binaries/data/mods/public/art/actors/units/romans/siege_rock.xml

@@ -3,6 +3,10 @@
   <castshadow/>
   <group>
     <variant frequency="100" name="rome ballista">
+      <animations> 
+        <animation file="mechanical/rome_ballista_idle.dae" name="Idle" speed="100"/>
+        <animation event="0.8" file="mechanical/rome_ballista_atttack.dae" name="Melee" speed="100"/>
+      </animations> 
       <mesh>structural/rome_ballista.dae</mesh>
       <texture>structural/rome_ballista.png</texture>
       <props>

binaries/data/mods/public/art/skeletons/skeletons.xml

@@ -1028,4 +1028,32 @@ This skeleton is for the deer and any other similiar shaped animals with the exa
 			</bone>
 		</bone>
     </skeleton>
+	
+    <standard_skeleton title="Ballista Weapon" id="ballista"> 
+                <bone name="main"> 
+                    <bone name="weapon"></bone> 
+						<bone name="lever"></bone>
+						<bone name="arm_left"></bone>
+						<bone name="arm_right"></bone>
+						<bone name="sling_left"></bone>
+						<bone name="sling"></bone>
+						<bone name="sling_right"></bone>
+                </bone> 
+	</standard_skeleton> 
+ 
+	<skeleton title="Ballista Weapon" target="ballista"> 
+                <identifier> 
+                        <root>ballista</root> 
+                </identifier> 
+                <bone name="main"><target>main</target> 
+                    <bone name="weapon"><target>weapon</target></bone> 
+						<bone name="lever"><target>lever</target></bone>
+						<bone name="arm_left"><target>arm_left</target></bone>
+						<bone name="arm_right"><target>arm_right</target></bone>
+						<bone name="sling_left"><target>sling_left</target></bone>
+						<bone name="sling"><target>sling</target></bone>
+						<bone name="sling_right"><target>sling_right</target></bone>
+                </bone> 
+	</skeleton>
+	
 </skeletons>

binaries/data/mods/public/audio/attack/siege/ballist_attack.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8" standalone="no" ?>
+<SoundGroup>
+	<Gain>1</Gain>
+	<Pitch>1</Pitch>
+	<Priority>100</Priority>
+	<ConeGain>1</ConeGain>
+	<ConeInner>360</ConeInner>
+	<ConeOuter>360</ConeOuter>
+	<Looping>0</Looping>
+	<RandOrder>1</RandOrder>
+	<RandGain>1</RandGain>
+	<GainUpper>0.9</GainUpper>
+	<GainLower>0.5</GainLower>
+	<RandPitch>1</RandPitch>
+	<PitchUpper>1.1</PitchUpper>
+	<PitchLower>0.9</PitchLower>
+	<Threshold>1</Threshold>
+	<Decay>3</Decay>
+	<Replacement>ballist_attack_01.ogg</Replacement>
+	<Path>audio/attack/siege</Path>
+	<Sound>ballist_attack_01.ogg</Sound>
+	<Sound>ballist_attack_02.ogg</Sound>
+</SoundGroup>

binaries/data/mods/public/simulation/templates/units/rome_mechanical_siege_ballista.xml

@@ -33,6 +33,11 @@
     <BarWidth>4.0</BarWidth>
     <BarHeight>0.5</BarHeight>
   </StatusBars>
+  <Sound>
+    <SoundGroups>
+      <attack>attack/siege/ballist_attack.xml</attack>
+    </SoundGroups>
+  </Sound>
   <Vision>
     <Range>94</Range>
   </Vision>