BatchTest: skip some test cases. If there are errors, they will show anyways
Don't run travis tests that do not use AspectJ
GeneratorsTest: also lower the number of tests to be done
Move tests to a better named package
Cleanup within the test package
Experimented with new ways of running travis builds
New travis runner for tests
Further reduction of test cases
New data structure DHashMultimap
Benchmark results for DHashMultimap
Make DHashMultimap available for all reflection-based stuff
Write profiler's best, worst, and current case into the standard stats.values to ease aggregation

Conflicts:
	config/io/names.properties
Bugfix in Profiler.finish() which printed RecommenderEntry but not ComparableEntryMap string representations
Once more: reduce complexity of GeneratorsTest and BatchTest
Profiler: write out graphical access statistics
Bugfix: in the case of Graph.getEdge(n1, n2), the dummy edge did not work properly
Default of plotting access statistics should be completely OFF
Some more fixes for the DummyEdge bug, and more thorough testing
new: Zalando GraphGenerators and BatchGenerators
new: (Weighted) Assortativity Coefficient Metrics