Added the current build num to the private namespace.

diff --git a/ARL.lua b/ARL.lua
index b1dc385..ff1df05 100644
--- a/ARL.lua
+++ b/ARL.lua
@@ -84,6 +84,8 @@ local SpecialtyTable
 -- Set up the private intra-file namespace.
 local private	= select(2, ...)

+private.build_num = select(2, GetBuildInfo())
+
 private.custom_list	= {}
 private.mob_list	= {}
 private.quest_list	= {}