New file naming standard to include underscores (less mess)

This was SVN commit r5830.

binaries/data/mods/official/audio/ambient/building/amb_farm.xml

@@ -16,10 +16,10 @@
 	<PitchLower>0.9</PitchLower>
 	<Threshold>2</Threshold>
 	<Decay>3</Decay>
-	<Replacement>amb_farm20.ogg</Replacement>
+	<Replacement>amb_farm_20.ogg</Replacement>
 	<Path>/audio/ambient/building/</Path>
-	<Sound>amb_farm13.ogg</Sound>
-	<Sound>amb_farm10.ogg</Sound>
-	<Sound>amb_farm11.ogg</Sound>
-	<Sound>amb_farm12.ogg</Sound>
+	<Sound>amb_farm_13.ogg</Sound>
+	<Sound>amb_farm_10.ogg</Sound>
+	<Sound>amb_farm_11.ogg</Sound>
+	<Sound>amb_farm_12.ogg</Sound>
 </SoundGroup>

binaries/data/mods/official/audio/ambient/building/amb_port.xml

@@ -16,10 +16,10 @@
 	<PitchLower>0.9</PitchLower>
 	<Threshold>2</Threshold>
 	<Decay>3</Decay>
-	<Replacement>amb_port20.ogg</Replacement>
+	<Replacement>amb_port_20.ogg</Replacement>
 	<Path>/audio/ambient/building/</Path>
-	<Sound>amb_port13.ogg</Sound>
-	<Sound>amb_port10.ogg</Sound>
-	<Sound>amb_port11.ogg</Sound>
-	<Sound>amb_port12.ogg</Sound>
+	<Sound>amb_port_21.ogg</Sound>
+	<Sound>amb_port_10.ogg</Sound>
+	<Sound>amb_port_11.ogg</Sound>
+	<Sound>amb_port_12.ogg</Sound>
 </SoundGroup>

binaries/data/mods/official/audio/ambient/building/amb_trade.xml

@@ -16,10 +16,10 @@
 	<PitchLower>0.9</PitchLower>
 	<Threshold>2</Threshold>
 	<Decay>3</Decay>
-	<Replacement>amb_trade20.ogg</Replacement>
+	<Replacement>amb_trade_20.ogg</Replacement>
 	<Path>/audio/ambient/building/</Path>
-	<Sound>amb_trade13.ogg</Sound>
-	<Sound>amb_trade10.ogg</Sound>
-	<Sound>amb_trade11.ogg</Sound>
-	<Sound>amb_trade12.ogg</Sound>
+	<Sound>amb_trade_13.ogg</Sound>
+	<Sound>amb_trade_10.ogg</Sound>
+	<Sound>amb_trade_11.ogg</Sound>
+	<Sound>amb_trade_12.ogg</Sound>
 </SoundGroup>