Added misisng images for Naga, orcish archer & bugg the sea orc.

data/units/Naga.cfg

@@ -21,5 +21,10 @@ get_hit_sound=mermen-hit.wav
 	range=short
 	damage=5
 	number=3
+		[frame]
+		begin=-100
+		end=100
+		image=naga-attack.png
+		[/frame]
 	[/attack]
 [/unit]

data/units/Orcish_Archer.cfg

@@ -2,6 +2,7 @@
 name=Orcish Archer
 race=orc
 image=orc-archer.png
+image_defensive=orc-archer-defend.png
 hitpoints=32
 movement_type=orcishfoot
 movement=5

data/units/Sea_Orc.cfg

@@ -20,6 +20,11 @@ get_hit_sound=groan.wav
 	range=short
 	damage=5
 	number=3
+		[frame]
+		begin=-100
+		end=100
+		image=sea-orc-attack.png
+		[/frame]
 		[sound]
 		time=-250
 		sound=sword-swish.wav