Fix #45, add support for attachment block in AvatarAppearance

This is just a guess based on what the data looks like. The message
template may not be representative of the actual template LL is using
and they may remove it at any time, but this seems close enough
to what is actually being used.

Also it stops the message from spamming me about unparsed data.

hippolyzer/lib/base/message/data/message_template.msg

@@ -3610,6 +3610,14 @@ version 2.0
 		AppearanceHover		Variable
 		{	HoverHeight	LLVector3	}
 	}
+	// SD NOTE: This is a guess based on looking at the data!
+	// See https://github.com/SaladDais/Hippolyzer/issues/45
+	// Update this when LL actually publishes the real template
+    {
+		AttachmentData		Variable
+		{	AttachmentID	LLUUID	}
+		{	AttachmentPoint	U8	}
+	}
 }
 
 // AvatarSitResponse - response to a request to sit on an object