update zones & quests design documents

git-svn-id: http://svn.net-core.org/repos/t-engine4@569 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/zones/ancient-elven-ruins/zone.lua

@@ -19,7 +19,7 @@
 
 return {
 	name = "Elven Ruins",
-	level_range = {10, 28},
+	level_range = {15, 28},
 	level_scheme = "player",
 	max_level = 3,
 	decay = {300, 800},