Moving metric tests to mesquite.treecmp.metrics package.
First attempt with coloring based on cluster assignments with TSV.
Dumb ,,One tree in cluster'' grouping algorithm.
Refactoring:
Place common getTrees and calculateDistanceMatrix methods in Utils.java.
Rename ClusterAssignment.java -> ClusterAssignmentTreeColoring.java
Import org.pr.clustering to new treecmp4Mesquite project and implementing hierarchical clustering.