edited meta-data of ispass03

ispass03/README

-DML-Version of the model from:
-http://se2.informatik.uni-wuerzburg.de/pa/publications/download/paper/231.pdf
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+DML-Version of a QPN model presented by Kounev and Buchmann at ISPASS 2003 which received a Best-Paper-Award 
+
+Samuel Kounev and Alejandro Buchmann. 
+Performance modeling of distributed e-business applications using queueing petri nets. 
+In Proceedings of the 2003 IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS 2003),
+Austin, Texas, USA, March 6-8, 2003, March 2003, pages 143-155. IEEE Computer Society, Washington, DC, USA. March 2003
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