removed useless _ folders

Dropbox/Dropbox.sol

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

Dropbox/Dropbox/Dropbox.prj

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+<Project name="Dropbox" guid="D71615F9-6C00-1014-B904-200204C60A89">
+	<Object name="Object" guid="D71616D6-6C00-1014-B904-200204C60A89">
+		<Script name="Dropbox_1.lsl" guid="D7162C8B-6C00-1014-B904-200204C60A89">
+		</Script>
+	</Object>
+</Project>

Dropbox/Dropbox/Object/Dropbox_1.lsl

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+// :CATEGORY:Drop Box
+// :NAME:Dropbox
+// :AUTHOR:Anonymous
+// :CREATED:2010-01-10 05:20:56.000
+// :EDITED:2013-09-18 15:38:52
+// :ID:264
+// :NUM:355
+// :REV:1.0
+// :WORLD:Second Life
+// :DESCRIPTION:
+// Dropbox.lsl
+// :CODE:
+
+//See the video at: http://cter.ed.uiuc.edu/tutorials/SecondLife/dropbox.mov
+//Created by ANONYMOUS.
+default 
+{ 
+state_entry() 
+{ 
+    llAllowInventoryDrop(TRUE); 
+    llSay(0, "Please drop your notecard here by dragging it into the box from your inventory."); 
+} 
+    changed(integer mask) 
+{ 
+    if(mask & (CHANGED_ALLOWED_DROP | CHANGED_INVENTORY)) 
+    llWhisper(0, "Thank you for submitting your notecard!"); 
+} 
+} // END //