fixed a bug in plotting for mult. series
little changes on previous bug fix
adds additional file-based batchGenerator
some fixes to the weighted APSP implementation
reorganization of APSP metric (unweighted)

- adds separate computation method for R version
- changes returned values and comparisson
adds weight notion to metric naming conventions
reorganization of APSP metric (weighted)
adds name-only constructor to DistributionLong
refactors APSP metrics
fixes a bug in the InWeighted APSP implementation
fixes bug in ReadableFilesBatchGenerator (no suffix correctly set)
fix apsp
fixes an error that leads to an ArrayOutOfBoundsException when trying to truncate an empty array
adds new method to plotting for parameters with series data array
fixes a bug in DArrayList that lead to null when attempting to get a node by index
adds new (Weak/Strong)Connectivity metrics (to replace connected components)
adds getter for components ofr Connectivity metric(s)
removes final statement from skipComments flag
plotting: now only one value plot for i series
aggr. bug fix on runs with differing batch size