add successive shortest path
change find negative cycle algortihm
add logging
must unvisit all vertices before loading negative cycle
Merge branch 'cca'

Conflicts:
	src/main/java/de/develman/mmi/algorithm/CycleCanceling.java
Merge branch 'cca'

Conflicts:
	src/main/java/de/develman/mmi/algorithm/CycleCanceling.java