Comments of Obani for the audio update

I compressed all the sounds of the server for they can take less room in
the repository. Some sounds were already compressed to maximum :
-
ambience_modpack (20Mb -> 10 Mb)
- bobblocks  (56kb -> 51kb)
-
builtin_item (37kb -> 8kb)
- christmas_craft (97kb -> 70kb)
-
death_messsages (247kb -> 244kb)
- fail (98kb -> 64kb)
- hunger (15kb ->
12kb)
- intweak (10kb -> 8kb)
- item_drop (40kb -> 32kb)
- lavatemple
(6kb -> 5kb)
- mobs (1,1Mb -> 957kb)
- multitest (6kb -> 5kb)
-
returnmirror (26,3kb -> 25,9kb)
- throwing (73kb -> 66kb)
- tsm_pyramids
(197kb -> 120kb)
- unified_inventory (282kb ->196kb)

I also renamed
the sound "Best Cardinal Bird" into "Best_Cardinal_Bird"
(ambience_modpack)

-> and update README

README.md

@@ -22,7 +22,7 @@ Contributors
 - davedevils
   > Gardener, creepers' father and chickens' friend
 - Obani
-  > Sound engineer
+  > Audio bit king
 
 minetestforfun_game sous-jeu et mods
 ===================
@@ -48,4 +48,4 @@ Contributeurs
 - davedevils
   > Jardinier, père des creeper et ami des poulets
 - Obani
-  > Ingénieur du son
+  > Roi du bit audio