removes log file
adds build/

- removes build/ from .gitignore
- moves ./build.xml to build/testing.xml
- adds vis.xml for building the visuaization
fixes a bug that lead to not reading the plot key correctly from the config
changes the distr used in motifs from int to long
adds APSP heuristic that uses SSSP from k nodes
reworked command line parameters
VIS: reading gui cfg and logo from .jar
VIS: added playback flag to cmd line parameters
VIS: moved control buttons to statsdisplay
renames EdgeListWriter to EdgeListGraphWriter
adds contributor and extends their description
adds FORMATS.md with a description of file formats
adds new long weights to formats.md
fixes a bus in SSSP