fixed problem with not plotted metric

problem occured when quality metric is created which lead to overwriting
of the original heuristic
fixed problems when starting with batch number != 0
fixed error when reading different distributions
equals methods for different distributions added
config changes
adds equals method for IntDistribution to ArrayUtils
adds denominator incr / decr methods to DistributionInt
rewrites degree distribution metric to use DistributionInt
handling of NodeValueLists in metrics
adds NODES/EDGES values to DegreeDistribution
changes computation of value quality (can now be < 0)
changes visibility of some Metric methods
improves batch dir listing to reflect order correctly
adds three metric wrappers to model imprecisions and imclude recomputations
changes the license to GPL v3
moves CliqueGraphGenerator to test package an deprecates it
adds handling of null input for parameters in ParameterList
adds directed and undireced clique generators
adds further printing capabilities to Graph