Add water bucket sounds from Voxelands

mods/CORE/mcl_sounds/README.txt

@@ -69,4 +69,9 @@ blukotek (CC0 1.0)
 https://www.freesound.org/people/blukotek/sounds/251660/
   default_dig_snappy.ogg
 
+Voxelands project <http://www.voxelands.com/> (CC BY-SA 3.0)
+  mcl_sounds_place_node_water.ogg
+  mcl_sounds_dug_water.ogg
 
+(Note: Artists from the Voxelands project include: sdzen, darkrose, sapier,
+      Tom Peter, Telaron, juskiddink)

mods/CORE/mcl_sounds/init.lua

@@ -127,6 +127,10 @@ function mcl_sounds.node_sound_water_defaults(table)
 	table = table or {}
 	table.footstep = table.footstep or
 			{name = "default_water_footstep", gain = 0.2}
+	table.place = table.place or
+			{name = "mcl_sounds_place_node_water", gain = 1.0}
+	table.dug = table.dug or
+			{name = "mcl_sounds_dug_water", gain = 1.0}
 	mcl_sounds.node_sound_defaults(table)
 	return table
 end