add timestamps to log output

init.lua

@@ -126,8 +126,8 @@ biome_lib.perlin_humidity = PerlinNoise(humidity_seeddiff, humidity_octaves, hum
 function biome_lib.dbg(msg, level)
 	local l = tonumber(level) or 0
 	if biome_lib.debug_log_level >= l then
-		print("[Biome Lib] "..msg)
-		minetest.log("verbose", "[Biome Lib] "..msg)
+		print(os.date("%F %H:%M:%S").." [Biome Lib]: "..msg)
+		minetest.log("verbose", "[Biome Lib]: "..msg)
 	end
 end