New Heavy Infantryman attack animation by Zoomo

[ci skip]

https://forums.wesnoth.org/viewtopic.php?p=624673#p624673

Images were edited to fix the shadow color. Frame 1 was also removed, since it was
the same as the baseframe.

All frames were also resized to better center the sprite on the hex.

data/core/units/humans/Loyalist_Heavy_Infantryman.cfg

@@ -31,9 +31,9 @@
         [filter_attack]
             name=mace
         [/filter_attack]
-        start_time=-230
+        start_time=-480
         [frame]
-            image="units/human-loyalists/heavyinfantry-attack-[1~2].png:[130,200]"
+            image="units/human-loyalists/heavyinfantry-attack-[1~15].png:[60*5,40*3,100,75,50*5]"
         [/frame]
         {SOUND:HIT_AND_MISS mace.ogg mace-miss.ogg -100}
         [frame]