Refresh function for StatisticsInfoPannel modified to show requirement information but still needs work. PlanningPokerSession now has a HashMap which holds statistics and estimates for requirements for which estimation is complete
Tests of statistic calculator functions now work with latest changes
fixed merge conflict in StatisticsInfoPannel.java
fixed possible divide by zero error in mean calculation and expanded test cases
removed some unintentional whitespace
PlanningPokerSession now has a function to get a specific RequirementEstimateStats object by reqID
reverted some broken changes to refresh function in StatisticsInfoPannel.java