FIX: handling of timestamped random seed

when using the current timestamp as random seed, this seed is now
stored in the series to be correctly written in the stats.properties
adds isFurtherBatchPossible method to BatchGenerators
last bug fixes
überflüssige methoden gelöscht
adds new types for integer weights
adds connectivity check methods to edges
adds first model of an undirected motif
adds first implementations of metrics for computing undirected motifs
second / improved version of undirected motifs
adds Stats class for simple stats output
changes dynamic motif computation fo keep list of motifs per node
moves gnuplot properties to config file
moves undirected motif metrics to new package
adds metrics for computing 3-directed motifs
adds round robin batch generator
adds edge rmoval capabilities to dynamic directed motif detection
fixes a bug in the motif computation (unnecessary incr/decr of the denominator)
adds motif count / approx metric
adds new versions of dynamic directed motifs
splits impl. of undicrected motifs