fix output path removed
Added StatisticianBase for easier implementations
Merge branch 'develop'

Conflicts:
	src/collector/hu/dmlab/lysander/collector/FileBackedCollector.java
	src/collector/hu/dmlab/lysander/collector/StatisticianBase.java
	src/collector/hu/dmlab/lysander/collector/statistics/AverageResponseTime.java
	src/collector/hu/dmlab/lysander/collector/statistics/MinMax.java
	test/src/hu/dmlab/lysander/collector/TestEvent.java