Added private.item_quality_names table.

diff --git a/Constants.lua b/Constants.lua
index 413cc2b..2a782bd 100644
--- a/Constants.lua
+++ b/Constants.lua
@@ -35,6 +35,15 @@ private.item_qualities = {
 	["ARTIFACT"]	= 6,
 }

+private.item_quality_names = {
+	[1] = "COMMON",
+	[2] = "UNCOMMON",
+	[3] = "RARE",
+	[4] = "EPIC",
+	[5] = "LEGENDARY",
+	[6] = "ARTIFACT",
+}
+
 -------------------------------------------------------------------------------
 -- Filter flags.
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