Corrected MANIFEST.MF to include xz package

Author: Bhui

MANIFEST.MF

@@ -3,4 +3,5 @@ Main-Class: sim.Launcher_ClusterModel
 Class-Path: . ClusterModel_lib/commons-math3-3.6.1.jar ClusterModel_lib/
  jgrapht-core-1.5.1.jar ClusterModel_lib/jheaps-0.13.jar ClusterModel_li
  b/jgrapht-ext-1.5.1.jar ClusterModel_lib/jgraphx-4.1.0.jar ClusterModel
- _lib/commons-compress-1.21.jar ClusterModel_lib/commons-io-2.11.0.jar
+ _lib/commons-compress-1.21.jar ClusterModel_lib/commons-io-2.11.0.jar C
+ lusterModel_lib/xz-1.9.jar