moves wrapper / helper batch generator to .util
moves random batch generators to .random
adds BarabasiAlbert model as BatchGenerator
adds growing random batch generator
adds graph generator based on batch
adds batch generator wrapper for repetition
adds random growth batch generator
adds edge list graph writer
adds flag for writing inverse edge for undirected graphs in EdgeListWriter
adds BatchGenerator RandomEdgeExchange
add barabase albert graph generator
moves graph generator to sub-packets and removed Generator suffix
FIX: removes (re)loading of config during series generation

the config was reloaded every time a series was generated overwriting
all poentially overwritten entries