explained a bit better how to get the python part with numpy etc. to work
made all executable
added missing rs param
added ignore file for this submodule
- streets are not deleted anymore on each run and thus deleting all the already read streets
- osmid is no index anymore as this will break with multiple runs eventually (or maybe just for wuerseln as one osmid is duplicated)
added data dumps for aachen, alsdorf and wuerselen