Add Johan Lundberg for his contribution to the TRolke class

git-svn-id: http://root.cern.ch/svn/root/trunk@30879 27541ba8-7e3a-0410-8455-c3a389f83636

README/CREDITS

@@ -448,6 +448,10 @@ N: Constantin Loizides
 E: loizides@MIT.EDU
 D: PROOF testing and debugging
 
+N: Johan Lundberg
+E: johan.lundberg@cern.ch
+D: Additions to the TRolke class
+
 N: Elaine Lyons
 E: unknown
 D: First versions of the Users Guide