Added Jethril assassin images

data/units/Assassin.cfg

@@ -2,6 +2,7 @@
 name=Assassin
 race=human
 image=assassin.png
+image_defensive=assassin-defend.png
 hitpoints=42
 movement_type=elusivefoot
 movement=6
@@ -48,7 +49,17 @@ get_hit_sound=groan.wav
 	special=poison
 	damage=5
 	number=3
-		[missile_frame]
+	    [frame] 
+    	    begin=-150 
+            end=0 
+	    image=assassin-throw-knife1.png 
+	    [/frame] 
+	    [frame] 
+	    begin=0 
+	    end=150 
+	    image=assassin-throw-knife2.png 
+	    [/frame]
+	    [missile_frame]
 		begin=-150
 		end=0
 		image=missiledagger-n.png