removed useless _ folders

Frog_sensor/Frog_sensor.sol

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+<Solution name="Frog_sensor">
+<Project name="Frog_sensor" path="Frog_sensor\Frog_sensor.prj" active="true"/>
+</Solution>

Frog_sensor/Frog_sensor/Frog_sensor.prj

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+<Project name="Frog_sensor" guid="D72737E2-6C00-1014-B904-200204C60A89">
+	<Object name="Object" guid="D72738C3-6C00-1014-B904-200204C60A89">
+		<Script name="Frog_sensor_1.lsl" guid="D727514A-6C00-1014-B904-200204C60A89">
+		</Script>
+	</Object>
+</Project>

Frog_sensor/Frog_sensor/Object/Frog_sensor_1.lsl

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+// :CATEGORY:Sound
+// :NAME:Frog_sensor
+// :AUTHOR:Anonymous
+// :CREATED:2010-01-10 05:20:56.000
+// :EDITED:2013-09-18 15:38:53
+// :ID:340
+// :NUM:458
+// :REV:1.0
+// :WORLD:Second Life
+// :DESCRIPTION:
+// Frog sensor.lsl
+// :CODE:
+
+// Frog player
+// Written by Ferd Frederix
+// Scans every 10 seconds for visitors within 5 meters.
+// then it croaks
+
+play ()
+{
+       string sound = "frog";
+       float value = llFrand(4.0) ;
+       integer file = (integer) value + 1;       
+       llPlaySound( sound + (string) file, 1.0);
+}
+ 
+default
+{
+    state_entry()
+    {
+        // arc=PI is a sphere, you could look more narrowly in the direction object is facing with PI/2, PI/4 etc.
+        // don't repeat this too often to avoid lag.
+        llSensorRepeat("", "", AGENT, 5.0, PI, 10.0);
+    }
+    
+    sensor(integer num_detected)
+    {
+        play();
+    }
+
+    touch(integer num_detected)
+    {
+        play();
+    }
+
+}
+// END //