Add contributions of Muriel Pivk and Paul Russo

git-svn-id: http://root.cern.ch/svn/root/trunk@13717 27541ba8-7e3a-0410-8455-c3a389f83636

README/CREDITS

@@ -399,6 +399,10 @@ N: Filip Pizlo
 E: pizlo@purdue.edu
 D: TBits extension and test program testbits.cxx
 
+N: Muriel Pivk
+E: Muriel.Pivk@cern.ch
+D: class TSPlot
+
 N: Timur Pocheptsov
 E: Timur.Pocheptsov@cern.ch
 D: Advanced OpenGL viewer.
@@ -423,6 +427,10 @@ N: Stefan Roiser
 E: Stefan.Roiser@cern.ch
 D: Reflex and Cintex
 
+N: Paul Russo
+E: russo@fnal.gov
+D: Improvements in I/o
+
 N: Pawel Sawicki
 E: Pawel.Sawicki@ifj.edu.pl
 D: the FOAM classes