Added reference to IsWrathBuild()

diff --git a/Clique.lua b/Clique.lua
index 2d82d1d..cb7efa8 100644
--- a/Clique.lua
+++ b/Clique.lua
@@ -2,6 +2,10 @@
   Clique by Cladhaire <cladhaire@gmail.com>
 ----------------------------------------------------------------------------------]]

+function IsWrathBuild()
+	return select(4, GetBuildInfo()) >= 30000
+end
+
 Clique = {Locals = {}}

 assert(DongleStub, string.format("Clique requires DongleStub."))