Changed name of metric to match Andrew's paper
Added summarization of response time results
Added group centered metrics
Fixed ranking of best groups
Added group centered metrics to testbeds
Added recomputing of results based on stored groups and graphs
Merge branch 'master' of github.com:jwbartel/SharingPredictionEvaluation

Conflicts:
	src/main/java/testbed/NewsgroupActionBasedSeedlessGroupRecommendationTestBed.java
	src/main/java/testbed/dataset/actions/ActionsDataSet.java